diff --git a/klp-admin/src/main/java/com/klp/web/controller/system/SysDeptController.java b/klp-admin/src/main/java/com/klp/web/controller/system/SysDeptController.java
index 81193513..3375f416 100644
--- a/klp-admin/src/main/java/com/klp/web/controller/system/SysDeptController.java
+++ b/klp-admin/src/main/java/com/klp/web/controller/system/SysDeptController.java
@@ -116,4 +116,16 @@ public class SysDeptController extends BaseController {
         deptService.checkDeptDataScope(deptId);
         return toAjax(deptService.deleteDeptById(deptId));
     }
+
+    /**
+     * 查询部门及其所有子部门
+     *
+     * @param deptId 部门ID
+     */
+    @SaCheckPermission("system:dept:list")
+    @GetMapping("/list/{deptId}")
+    public R<List<SysDept>> listWithChildren(@PathVariable Long deptId) {
+        List<SysDept> depts = deptService.selectChildDeptsById(deptId);
+        return R.ok(depts);
+    }
 }
diff --git a/klp-system/src/main/java/com/klp/system/service/ISysDeptService.java b/klp-system/src/main/java/com/klp/system/service/ISysDeptService.java
index 8c5732cb..5b3cea5a 100644
--- a/klp-system/src/main/java/com/klp/system/service/ISysDeptService.java
+++ b/klp-system/src/main/java/com/klp/system/service/ISysDeptService.java
@@ -113,4 +113,12 @@ public interface ISysDeptService {
      * @return 结果
      */
     int deleteDeptById(Long deptId);
+
+    /**
+     * 根据部门ID查询所有子部门（递归）
+     *
+     * @param deptId 部门ID
+     * @return 所有子部门列表
+     */
+    List<SysDept> selectChildDeptsById(Long deptId);
 }
diff --git a/klp-system/src/main/java/com/klp/system/service/impl/SysDeptServiceImpl.java b/klp-system/src/main/java/com/klp/system/service/impl/SysDeptServiceImpl.java
index 84026b55..d74d682b 100644
--- a/klp-system/src/main/java/com/klp/system/service/impl/SysDeptServiceImpl.java
+++ b/klp-system/src/main/java/com/klp/system/service/impl/SysDeptServiceImpl.java
@@ -270,6 +270,16 @@ public class SysDeptServiceImpl implements ISysDeptService, DeptService {
             .in(SysDept::getDeptId, Arrays.asList(deptIds)));
     }
 
+    @Override
+    public List<SysDept> selectChildDeptsById(Long deptId) {
+        // 创建查询条件，查找祖先列表中包含指定部门ID的所有部门
+        LambdaQueryWrapper<SysDept> lqw = new LambdaQueryWrapper<>();
+        lqw.eq(SysDept::getDelFlag, "0")
+            .apply(DataBaseHelper.findInSet(deptId, "ancestors"));
+        
+        return baseMapper.selectList(lqw);
+    }
+
     /**
      * 修改子元素关系
      *