diff --git a/backend/src/main/java/com/designhub/service/UserService.java b/backend/src/main/java/com/designhub/service/UserService.java
index 77debc6..f843b5c 100644
--- a/backend/src/main/java/com/designhub/service/UserService.java
+++ b/backend/src/main/java/com/designhub/service/UserService.java
@@ -1213,7 +1213,9 @@ public class UserService {
         queryWrapper.eq(User::getStatus, 1); // 只查询启用的用户
         queryWrapper.eq(User::getDeleted, 0); // 未删除
         if (deptId != null) {
-            queryWrapper.eq(User::getDeptId, deptId);
+            // 递归获取所有子部门ID（包含自身）
+            List<Long> allDeptIds = getAllSubDepartmentIds(deptId);
+            queryWrapper.in(User::getDeptId, allDeptIds);
         }
         queryWrapper.orderByAsc(User::getRealName);
         
@@ -1280,6 +1282,28 @@ public class UserService {
         return result;
     }
 
+    /**
+     * 递归获取所有子部门ID（包括自身）
+     */
+    private List<Long> getAllSubDepartmentIds(Long deptId) {
+        List<Long> deptIds = new ArrayList<>();
+        deptIds.add(deptId);
+        
+        // 查询直接子部门
+        List<Department> subDepts = departmentMapper.selectList(
+            new LambdaQueryWrapper<Department>()
+                .eq(Department::getParentId, deptId)
+                .eq(Department::getStatus, 1)
+                .eq(Department::getDeleted, 0)
+        );
+        
+        for (Department subDept : subDepts) {
+            deptIds.addAll(getAllSubDepartmentIds(subDept.getId()));
+        }
+        
+        return deptIds;
+    }
+
     /**
      * 设置/取消管理员
      */