diff --git a/catch/permissions/model/Department.php b/catch/permissions/model/Department.php
index c2a87cb..efdf219 100644
--- a/catch/permissions/model/Department.php
+++ b/catch/permissions/model/Department.php
@@ -39,4 +39,26 @@ class Department extends CatchModel
                     ->catchOrder()
                     ->select()->toTree();
     }
+
+
+    /**
+     * 获取部门
+     *
+     * @time 2020年11月04日
+     * @param array $departmentIds
+     * @throws DbException
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\ModelNotFoundException
+     * @return array
+     */
+    public static function getAllChildrenIds(array $departmentIds)
+    {
+        $childDepartmentIds = self::whereIn('parent_id', $departmentIds)->column('id');
+
+        if (!empty($childDepartmentIds)) {
+            $childDepartmentIds = array_merge($childDepartmentIds, self::getAllChildrenIds($childDepartmentIds));
+        }
+
+        return $childDepartmentIds;
+    }
 }
diff --git a/catch/permissions/model/search/UserSearch.php b/catch/permissions/model/search/UserSearch.php
index 2dcf4cd..0e2ea8e 100644
--- a/catch/permissions/model/search/UserSearch.php
+++ b/catch/permissions/model/search/UserSearch.php
@@ -22,8 +22,10 @@ trait UserSearch
 
     public function searchDepartmentIdAttr($query, $value, $data)
     {
-        $departmentIds = Department::where('parent_id', $value)->column('id');
-        $departmentIds[] = $value;
+        $departmentIds = Department::getAllChildrenIds([$value]);
+
+        $departmentIds[] = intval($value);
+
         return $query->whereIn($this->aliasField('department_id'), $departmentIds);
     }
 }