diff --git a/server/internal/logic/sys/im_admin_scope.go b/server/internal/logic/sys/im_admin_scope.go
index 054e367..714c6ef 100644
--- a/server/internal/logic/sys/im_admin_scope.go
+++ b/server/internal/logic/sys/im_admin_scope.go
@@ -17,6 +17,7 @@ import (
 	"github.com/gogf/gf/v2/net/ghttp"
 	"github.com/gogf/gf/v2/os/gctx"
 	"github.com/gogf/gf/v2/os/gtime"
+	"strings"
 )
 
 type imAdminScope struct {
@@ -85,6 +86,43 @@ func resolveImAdminBoundTenant(ctx context.Context) (int64, error) {
 	return tenantId, nil
 }
 
+// ensureImRecordTenantAllowed 校验目标记录/租户是否在当前操作者允许范围内。
+// 平台管理员（超管/平台角色/未绑定租户的公司部门）可访问任意租户的记录；
+// 其余账号强制限定为自己绑定的租户（与 resolveImAdminScope 的范围逻辑一致）。
+// 适用于入参不含租户ID、需按已查出的记录租户做后置校验的场景。
+func ensureImRecordTenantAllowed(ctx context.Context, recordTenantId int64) error {
+	if isImPlatformAdmin(ctx, contexts.GetUserId(ctx)) {
+		return nil
+	}
+	if !contexts.IsTenantDept(ctx) && !(contexts.IsCompanyDept(ctx) && contexts.GetTenantId(ctx) > 0) {
+		return gerror.New("当前账号无权管理IM租户")
+	}
+	boundTenantId, err := resolveImAdminBoundTenant(ctx)
+	if err != nil {
+		return err
+	}
+	if boundTenantId != recordTenantId {
+		return gerror.New("无权访问其他商户的IM数据")
+	}
+	return nil
+}
+
+// lookupImTenantByCode 按租户编码查询租户（用于入参只有租户编码的管理端接口）
+func lookupImTenantByCode(ctx context.Context, code string) (tenant *entity.ImTenant, err error) {
+	code = strings.TrimSpace(code)
+	if code == "" {
+		return nil, gerror.New("请选择IM租户")
+	}
+	if err = imtenant.RegistryDB().Model(dao.ImTenant.Table()).Safe().Ctx(ctx).
+		Where(dao.ImTenant.Columns().Code, code).Scan(&tenant); err != nil {
+		return nil, gerror.Wrap(err, "获取IM租户失败")
+	}
+	if tenant == nil || tenant.Id <= 0 {
+		return nil, gerror.New("IM租户不存在")
+	}
+	return tenant, nil
+}
+
 func ensureImTenantActive(ctx context.Context, tenantId int64) (err error) {
 	var tenant *entity.ImTenant
 	if err = imtenant.RegistryDB().Model(dao.ImTenant.Table()).Safe().Ctx(ctx).WherePri(tenantId).Scan(&tenant); err != nil {
diff --git a/server/internal/logic/sys/im_dead_letter.go b/server/internal/logic/sys/im_dead_letter.go
index 11d16f9..86b934c 100644
--- a/server/internal/logic/sys/im_dead_letter.go
+++ b/server/internal/logic/sys/im_dead_letter.go
@@ -10,18 +10,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"hotgo/internal/consts"
-	"hotgo/internal/dao"
 	"hotgo/internal/library/contexts"
 	"hotgo/internal/library/imadmin"
 	"hotgo/internal/library/imkafka"
-	"hotgo/internal/library/imtenant"
-	"hotgo/internal/model/entity"
 	"hotgo/internal/model/input/sysin"
 	"hotgo/internal/service"
 	"net/url"
 	"strconv"
-
-	"github.com/gogf/gf/v2/errors/gerror"
 )
 
 type sSysImDeadLetter struct{}
@@ -39,7 +34,7 @@ func (s *sSysImDeadLetter) List(ctx context.Context, in *sysin.ImDeadLetterListI
 	if err = in.Filter(ctx); err != nil {
 		return nil, err
 	}
-	tenant, err := s.getTenant(ctx, in.TenantId)
+	tenant, err := resolveImAdminTenant(ctx, in.TenantId)
 	if err != nil {
 		return nil, err
 	}
@@ -81,7 +76,7 @@ func (s *sSysImDeadLetter) View(ctx context.Context, in *sysin.ImDeadLetterViewI
 	if err = in.Filter(ctx); err != nil {
 		return nil, err
 	}
-	tenant, err := s.getTenant(ctx, in.TenantId)
+	tenant, err := resolveImAdminTenant(ctx, in.TenantId)
 	if err != nil {
 		return nil, err
 	}
@@ -120,7 +115,7 @@ func (s *sSysImDeadLetter) publishActionCommand(ctx context.Context, in *sysin.I
 	if err := in.Filter(ctx); err != nil {
 		return nil, err
 	}
-	tenant, err := s.getTenant(ctx, in.TenantId)
+	tenant, err := resolveImAdminTenant(ctx, in.TenantId)
 	if err != nil {
 		return nil, err
 	}
@@ -162,22 +157,6 @@ func (s *sSysImDeadLetter) publishActionCommand(ctx context.Context, in *sysin.I
 	}, nil
 }
 
-func (s *sSysImDeadLetter) getTenant(ctx context.Context, tenantId int64) (tenant *entity.ImTenant, err error) {
-	if tenantId <= 0 {
-		return nil, gerror.New("请选择IM租户")
-	}
-	if err = imtenant.RegistryDB().Model(dao.ImTenant.Table()).Safe().Ctx(ctx).WherePri(tenantId).Scan(&tenant); err != nil {
-		return nil, gerror.Wrap(err, "获取IM租户失败")
-	}
-	if tenant == nil || tenant.Id <= 0 {
-		return nil, gerror.New("IM租户不存在")
-	}
-	if tenant.State != consts.ImTenantStateActive {
-		return nil, gerror.New("IM租户未启用")
-	}
-	return tenant, nil
-}
-
 func convertDeadLetterModel(in *sysin.ImDeadLetterListModelRaw) *sysin.ImDeadLetterListModel {
 	if in == nil {
 		return &sysin.ImDeadLetterListModel{}
diff --git a/server/internal/logic/sys/im_kafka_command.go b/server/internal/logic/sys/im_kafka_command.go
index ae97609..d1e4717 100644
--- a/server/internal/logic/sys/im_kafka_command.go
+++ b/server/internal/logic/sys/im_kafka_command.go
@@ -33,7 +33,12 @@ func (s *sSysImKafkaCommand) List(ctx context.Context, in *sysin.ImKafkaCommandL
 	if err = in.Filter(ctx); err != nil {
 		return
 	}
-	where, args := buildImKafkaCommandWhere(in)
+	// 强制租户范围：商户绑定账号忽略前端所选租户，平台管理员使用所选租户
+	scope, err := resolveImAdminScope(ctx, in.TenantId)
+	if err != nil {
+		return
+	}
+	where, args := buildImKafkaCommandWhere(in, scope.TenantId)
 	db := imtenant.RegistryDB()
 	totalValue, err := db.GetValue(ctx, "SELECT COUNT(*) FROM im_admin_commands "+where, args...)
 	if err != nil {
@@ -91,16 +96,16 @@ func (s *sSysImKafkaCommand) View(ctx context.Context, in *sysin.ImKafkaCommandV
 	if err = row.Struct(&res); err != nil {
 		return nil, gerror.Wrap(err, "解析IM后台命令详情失败，请稍后重试！")
 	}
+	// 后置校验记录归属租户是否在操作者允许范围内
+	if err = ensureImRecordTenantAllowed(ctx, res.TenantId); err != nil {
+		return nil, err
+	}
 	return
 }
 
-func buildImKafkaCommandWhere(in *sysin.ImKafkaCommandListInp) (string, []any) {
-	parts := []string{"1=1"}
-	args := []any{}
-	if in.TenantId > 0 {
-		parts = append(parts, "tenant_id=?")
-		args = append(args, in.TenantId)
-	}
+func buildImKafkaCommandWhere(in *sysin.ImKafkaCommandListInp, scopeTenantId int64) (string, []any) {
+	parts := []string{"tenant_id=?"}
+	args := []any{scopeTenantId}
 	if in.CommandId != "" {
 		parts = append(parts, "command_id LIKE ?")
 		args = append(args, "%"+in.CommandId+"%")
@@ -136,6 +141,14 @@ func (s *sSysImKafkaCommand) CacheInvalidate(ctx context.Context, in *sysin.ImKa
 	if err = in.Filter(ctx); err != nil {
 		return nil, err
 	}
+	// 校验目标租户是否在操作者允许范围内
+	tenant, err := lookupImTenantByCode(ctx, in.TenantCode)
+	if err != nil {
+		return nil, err
+	}
+	if err = ensureImRecordTenantAllowed(ctx, tenant.Id); err != nil {
+		return nil, err
+	}
 	user := contexts.GetUser(ctx)
 	actor := &imkafka.Actor{
 		Type: "admin",
@@ -170,6 +183,14 @@ func (s *sSysImKafkaCommand) WorkbenchEvent(ctx context.Context, in *sysin.ImKaf
 	if err = in.Filter(ctx); err != nil {
 		return nil, err
 	}
+	// 校验目标租户是否在操作者允许范围内
+	tenant, err := lookupImTenantByCode(ctx, in.TenantCode)
+	if err != nil {
+		return nil, err
+	}
+	if err = ensureImRecordTenantAllowed(ctx, tenant.Id); err != nil {
+		return nil, err
+	}
 	user := contexts.GetUser(ctx)
 	actor := &imkafka.Actor{
 		Type: "admin",
diff --git a/web/src/views/im/registrationInvite/model.ts b/web/src/views/im/registrationInvite/model.ts
index d6eaf32..05fd151 100644
--- a/web/src/views/im/registrationInvite/model.ts
+++ b/web/src/views/im/registrationInvite/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -40,6 +40,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: true,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imAbuseReason/model.ts b/web/src/views/imAbuseReason/model.ts
index 658bf32..dfd7a63 100644
--- a/web/src/views/imAbuseReason/model.ts
+++ b/web/src/views/imAbuseReason/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -42,6 +42,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imAuditLog/model.ts b/web/src/views/imAuditLog/model.ts
index ae79bca..4dae81e 100644
--- a/web/src/views/imAuditLog/model.ts
+++ b/web/src/views/imAuditLog/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 export const tenantOptions = ref<any[]>([]);
 
@@ -45,6 +45,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imDashboard/index.vue b/web/src/views/imDashboard/index.vue
index d3d1ba3..aed1570 100644
--- a/web/src/views/imDashboard/index.vue
+++ b/web/src/views/imDashboard/index.vue
@@ -7,6 +7,7 @@
             <n-select
               v-model:value="tenantId"
               :options="imQueryTenantOptions"
+              :disabled="isTenantBound()"
               class="tenant-select"
               placeholder="请选择商户"
             />
@@ -40,6 +41,7 @@
   import { useMessage } from 'naive-ui';
   import { Overview, Trends } from '@/api/imDashboard';
   import { imQueryTenantOptions, loadImQueryTenantOptions } from '@/views/imAdminQueryShared';
+  import { isTenantBound } from '@/views/imTenantOptions';
 
   const message = useMessage();
   const tenantId = ref(0);
diff --git a/web/src/views/imDeadLetter/model.ts b/web/src/views/imDeadLetter/model.ts
index a2eddc3..e1d1f02 100644
--- a/web/src/views/imDeadLetter/model.ts
+++ b/web/src/views/imDeadLetter/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -50,6 +50,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: true,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imExternalConfig/model.ts b/web/src/views/imExternalConfig/model.ts
index 41f2e87..0f3f5c6 100644
--- a/web/src/views/imExternalConfig/model.ts
+++ b/web/src/views/imExternalConfig/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -46,6 +46,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imFeedbackConfig/index.vue b/web/src/views/imFeedbackConfig/index.vue
index 5d98ba4..18727c2 100644
--- a/web/src/views/imFeedbackConfig/index.vue
+++ b/web/src/views/imFeedbackConfig/index.vue
@@ -15,6 +15,7 @@
           <n-select
             v-model:value="selectedTenantId"
             :options="tenantOptions"
+            :disabled="isTenantBound()"
             placeholder="请选择商户"
             @update:value="loadConfig"
           />
@@ -72,6 +73,7 @@
   import { useMessage } from 'naive-ui';
   import { usePermission } from '@/hooks/web/usePermission';
   import { Get, Update } from '@/api/imFeedbackConfig';
+  import { isTenantBound } from '@/views/imTenantOptions';
   import { loadOptions, loadTenantOptions, newState, rules, State, tenantOptions } from './model';
 
   const message = useMessage();
diff --git a/web/src/views/imFile/model.ts b/web/src/views/imFile/model.ts
index 439084d..16e3a3b 100644
--- a/web/src/views/imFile/model.ts
+++ b/web/src/views/imFile/model.ts
@@ -3,7 +3,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -49,6 +49,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imFilePolicy/model.ts b/web/src/views/imFilePolicy/model.ts
index efa914a..3a56e88 100644
--- a/web/src/views/imFilePolicy/model.ts
+++ b/web/src/views/imFilePolicy/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -42,6 +42,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imGroup/model.ts b/web/src/views/imGroup/model.ts
index 1931326..fffeee9 100644
--- a/web/src/views/imGroup/model.ts
+++ b/web/src/views/imGroup/model.ts
@@ -4,7 +4,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -122,6 +122,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imKafkaCommand/model.ts b/web/src/views/imKafkaCommand/model.ts
index 32244b6..ea3aca8 100644
--- a/web/src/views/imKafkaCommand/model.ts
+++ b/web/src/views/imKafkaCommand/model.ts
@@ -3,7 +3,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -52,6 +52,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: true,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imLoginFailureLog/model.ts b/web/src/views/imLoginFailureLog/model.ts
index edb4efc..d3ca331 100644
--- a/web/src/views/imLoginFailureLog/model.ts
+++ b/web/src/views/imLoginFailureLog/model.ts
@@ -3,6 +3,7 @@ import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
 import { imQueryTenantOptions } from '@/views/imAdminQueryShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -13,6 +14,7 @@ export const schemas = ref<FormSchema[]>([
     label: '商户',
     componentProps: {
       clearable: false,
+      disabled: isTenantBound(),
       options: computed(() => imQueryTenantOptions.value),
       placeholder: '请选择商户',
     },
diff --git a/web/src/views/imMailboxConfig/index.vue b/web/src/views/imMailboxConfig/index.vue
index 8b8ba5a..2a403bf 100644
--- a/web/src/views/imMailboxConfig/index.vue
+++ b/web/src/views/imMailboxConfig/index.vue
@@ -15,6 +15,7 @@
           <n-select
             v-model:value="selectedTenantId"
             :options="tenantOptions"
+            :disabled="isTenantBound()"
             placeholder="请选择商户"
             @update:value="loadConfig"
           />
@@ -78,6 +79,7 @@
   import { useMessage } from 'naive-ui';
   import { usePermission } from '@/hooks/web/usePermission';
   import { Get, Update } from '@/api/imMailboxConfig';
+  import { isTenantBound } from '@/views/imTenantOptions';
   import { loadOptions, loadTenantOptions, newState, rules, State, tenantOptions } from './model';
 
   const message = useMessage();
diff --git a/web/src/views/imMessageShared/model.ts b/web/src/views/imMessageShared/model.ts
index 0663d6e..0a7de41 100644
--- a/web/src/views/imMessageShared/model.ts
+++ b/web/src/views/imMessageShared/model.ts
@@ -3,6 +3,7 @@ import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
 import { imQueryTenantOptions } from '@/views/imAdminQueryShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -14,6 +15,7 @@ export function createMessageSchemas(group: boolean) {
       label: '商户',
       componentProps: {
         clearable: false,
+        disabled: isTenantBound(),
         options: computed(() => imQueryTenantOptions.value),
         placeholder: '请选择商户',
       },
diff --git a/web/src/views/imNotification/model.ts b/web/src/views/imNotification/model.ts
index 0afe0d1..31d5615 100644
--- a/web/src/views/imNotification/model.ts
+++ b/web/src/views/imNotification/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -44,6 +44,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imOrg/model.ts b/web/src/views/imOrg/model.ts
index 4e2aa2f..9a6d3d6 100644
--- a/web/src/views/imOrg/model.ts
+++ b/web/src/views/imOrg/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -77,6 +77,7 @@ export const departmentSchemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imOutbox/model.ts b/web/src/views/imOutbox/model.ts
index 2e252e4..0321961 100644
--- a/web/src/views/imOutbox/model.ts
+++ b/web/src/views/imOutbox/model.ts
@@ -3,7 +3,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -48,6 +48,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imPolicyShared.ts b/web/src/views/imPolicyShared.ts
index a015681..b13ea74 100644
--- a/web/src/views/imPolicyShared.ts
+++ b/web/src/views/imPolicyShared.ts
@@ -1,6 +1,5 @@
 import { ref } from 'vue';
-import { useUserStore } from '@/store/modules/user';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 export { getDefaultTenantValue } from '@/views/imTenantOptions';
 
@@ -9,7 +8,8 @@ const tenantOnlyOptions = ref<any[]>([]);
 
 export async function loadPolicyTenantOptions(includeGlobal = true) {
   const tenants = await loadImTenantOptions(tenantOnlyOptions, { page: 1, perPage: 100 });
-  const canUseGlobal = includeGlobal && useUserStore().isCompanyDept;
+  // 商户绑定账号不显示“全局默认”，仅平台管理员（未绑定租户）可配置全局策略
+  const canUseGlobal = includeGlobal && !isTenantBound();
   policyTenantOptions.value = canUseGlobal
     ? [{ label: '全局默认', value: 0 }, ...tenants]
     : tenants;
diff --git a/web/src/views/imRealname/model.ts b/web/src/views/imRealname/model.ts
index d89d3fd..e2da202 100644
--- a/web/src/views/imRealname/model.ts
+++ b/web/src/views/imRealname/model.ts
@@ -3,7 +3,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -46,6 +46,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imSecurityPolicy/model.ts b/web/src/views/imSecurityPolicy/model.ts
index 01c8f26..2dc51c2 100644
--- a/web/src/views/imSecurityPolicy/model.ts
+++ b/web/src/views/imSecurityPolicy/model.ts
@@ -2,6 +2,7 @@ import { computed, ref } from 'vue';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
 import { policyTenantOptions } from '@/views/imPolicyShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 export const schemas = ref<FormSchema[]>([
@@ -9,7 +10,7 @@ export const schemas = ref<FormSchema[]>([
     field: 'tenantId',
     component: 'NSelect',
     label: '商户',
-    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false },
+    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false, disabled: isTenantBound() },
   },
   {
     field: 'publishStatus',
diff --git a/web/src/views/imSensitiveWord/model.ts b/web/src/views/imSensitiveWord/model.ts
index 8067076..7c6a5cf 100644
--- a/web/src/views/imSensitiveWord/model.ts
+++ b/web/src/views/imSensitiveWord/model.ts
@@ -3,6 +3,7 @@ import { NTag } from 'naive-ui';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
 import { policyTenantOptions } from '@/views/imPolicyShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 import { renderOptionTag } from '@/utils';
 
 const dict = useDictStore();
@@ -12,7 +13,7 @@ export const schemas = ref<FormSchema[]>([
     field: 'tenantId',
     component: 'NSelect',
     label: '商户',
-    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false },
+    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false, disabled: isTenantBound() },
   },
   { field: 'word', component: 'NInput', label: '敏感词', componentProps: { clearable: true } },
   {
diff --git a/web/src/views/imTaskDashboard/model.ts b/web/src/views/imTaskDashboard/model.ts
index e1493bd..3ad10fc 100644
--- a/web/src/views/imTaskDashboard/model.ts
+++ b/web/src/views/imTaskDashboard/model.ts
@@ -1,7 +1,7 @@
 import { computed, ref } from 'vue';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -34,6 +34,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: true,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imTenantOptions.ts b/web/src/views/imTenantOptions.ts
index 2f1bb48..4237f28 100644
--- a/web/src/views/imTenantOptions.ts
+++ b/web/src/views/imTenantOptions.ts
@@ -1,6 +1,7 @@
 import { Ref } from 'vue';
 import { List as TenantList } from '@/api/imTenant';
 import { useUserStore } from '@/store/modules/user';
+import type { FormSchema } from '@/components/Form';
 
 export interface ImTenantOption {
   label: string;
@@ -26,15 +27,10 @@ export async function loadImTenantOptions(
   target: Ref<ImTenantOption[]>,
   params: Record<string, any> = { page: 1, perPage: 100 }
 ) {
-  const userStore = useUserStore();
-  const userInfo = { ...readTokenUserInfo(userStore.getToken), ...(userStore.getUserInfo as any) };
-  const boundTenantId = Number(userInfo?.tenantId || userInfo?.tenantID || 0);
+  const boundTenantId = getBoundTenantId();
 
-  if (!userStore.isCompanyDept) {
-    if (boundTenantId <= 0) {
-      target.value = [];
-      return target.value;
-    }
+  // 登录用户已绑定商户租户：仅返回自己商户选项（与后端 resolveImAdminScope 强制范围一致）
+  if (boundTenantId > 0) {
     let tenant: any = null;
     try {
       const res = await TenantList({ ...params, id: boundTenantId, page: 1, perPage: 1 });
@@ -42,20 +38,11 @@ export async function loadImTenantOptions(
     } catch {
       tenant = null;
     }
-    target.value = [
-      tenant
-        ? toTenantOption(tenant)
-        : {
-            label: formatImTenantLabel({
-              id: boundTenantId,
-              name: userInfo?.tenantName,
-              code: userInfo?.tenantCode,
-            }),
-            value: boundTenantId,
-            code: userInfo?.tenantCode,
-            name: userInfo?.tenantName,
-          },
-    ];
+    if (!tenant) {
+      const info = readTokenUserInfo(useUserStore().getToken);
+      tenant = { id: boundTenantId, name: info?.tenantName, code: info?.tenantCode };
+    }
+    target.value = [toTenantOption(tenant)];
     return target.value;
   }
 
@@ -64,6 +51,26 @@ export async function loadImTenantOptions(
   return target.value;
 }
 
+// 登录用户绑定的商户租户ID（按绑定租户判定，与后端 resolveImAdminScope 的范围逻辑一致）
+export function getBoundTenantId(): number {
+  const userStore = useUserStore();
+  const userInfo = { ...readTokenUserInfo(userStore.getToken), ...(userStore.getUserInfo as any) };
+  return Number(userInfo?.tenantId || userInfo?.tenantID || 0);
+}
+
+// 登录用户是否为商户绑定账号（true=下拉框只显示并锁定自己商户）
+export function isTenantBound(): boolean {
+  return getBoundTenantId() > 0;
+}
+
+// 商户绑定账号：锁定搜索表单中的商户下拉项（仅一项、不可清除、不可更改）
+export function lockTenantSchema(schema?: FormSchema) {
+  if (!schema || !isTenantBound()) return;
+  const props: any = (schema.componentProps = schema.componentProps || {});
+  props.disabled = true;
+  props.clearable = false;
+}
+
 function toTenantOption(item: any): ImTenantOption {
   return {
     label: formatImTenantLabel(item),
diff --git a/web/src/views/imUser/model.ts b/web/src/views/imUser/model.ts
index c5e739b..14d0173 100644
--- a/web/src/views/imUser/model.ts
+++ b/web/src/views/imUser/model.ts
@@ -3,7 +3,7 @@ import { NImage, NTag } from 'naive-ui';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 import { List as PolicyGroupList } from '@/api/imUserPolicyGroup';
 import defaultAvatar from '@/assets/images/schoolboy.png';
 
@@ -86,6 +86,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imUserLoginHistory/model.ts b/web/src/views/imUserLoginHistory/model.ts
index 82f8319..9319330 100644
--- a/web/src/views/imUserLoginHistory/model.ts
+++ b/web/src/views/imUserLoginHistory/model.ts
@@ -3,6 +3,7 @@ import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
 import { imQueryTenantOptions } from '@/views/imAdminQueryShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -13,6 +14,7 @@ export const schemas = ref<FormSchema[]>([
     label: '商户',
     componentProps: {
       clearable: false,
+      disabled: isTenantBound(),
       options: computed(() => imQueryTenantOptions.value),
       placeholder: '请选择商户',
     },
diff --git a/web/src/views/imUserPolicyGroup/model.ts b/web/src/views/imUserPolicyGroup/model.ts
index d2e901a..48c1179 100644
--- a/web/src/views/imUserPolicyGroup/model.ts
+++ b/web/src/views/imUserPolicyGroup/model.ts
@@ -2,6 +2,7 @@ import { computed, ref } from 'vue';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
 import { policyTenantOptions } from '@/views/imPolicyShared';
+import { isTenantBound } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -24,7 +25,7 @@ export const schemas = ref<FormSchema[]>([
     field: 'tenantId',
     component: 'NSelect',
     label: '商户',
-    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false },
+    componentProps: { options: computed(() => policyTenantOptions.value), clearable: false, disabled: isTenantBound() },
   },
   {
     field: 'keyword',
diff --git a/web/src/views/imWorkOrder/model.ts b/web/src/views/imWorkOrder/model.ts
index 7e0c16d..adaf26c 100644
--- a/web/src/views/imWorkOrder/model.ts
+++ b/web/src/views/imWorkOrder/model.ts
@@ -3,7 +3,7 @@ import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { defRangeShortcuts } from '@/utils/dateUtil';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -88,6 +88,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },
diff --git a/web/src/views/imWorkbench/model.ts b/web/src/views/imWorkbench/model.ts
index f107121..1e24d2b 100644
--- a/web/src/views/imWorkbench/model.ts
+++ b/web/src/views/imWorkbench/model.ts
@@ -2,7 +2,7 @@ import { computed, ref } from 'vue';
 import { cloneDeep } from 'lodash-es';
 import { FormSchema } from '@/components/Form';
 import { useDictStore } from '@/store/modules/dict';
-import { loadImTenantOptions } from '@/views/imTenantOptions';
+import { isTenantBound, loadImTenantOptions } from '@/views/imTenantOptions';
 
 const dict = useDictStore();
 
@@ -44,6 +44,7 @@ export const schemas = ref<FormSchema[]>([
     componentProps: {
       clearable: false,
       options: computed(() => tenantOptions.value),
+      disabled: isTenantBound(),
       placeholder: '请选择商户',
     },
   },