diff --git a/app/admin/controller/v1/AttachmentCategory.php b/app/admin/controller/v1/AttachmentCategory.php
index cc0c4b45..09f283a4 100644
--- a/app/admin/controller/v1/AttachmentCategory.php
+++ b/app/admin/controller/v1/AttachmentCategory.php
@@ -11,20 +11,48 @@ use app\admin\validate\v1\AttachmentCategoryValidate;
  */
 class AttachmentCategory
 {
+    /**
+     * 列表树形结构
+     */
+    public function tree()
+    {
+        $params = request()->param([
+            'name',
+            'is_show'
+        ]);
+
+        $categorys = AttachmentCategoryModel::field([
+                'id',
+                'pid',
+                'name'
+            ])
+            ->withSearch(['name'], [
+                'name' => $params['name']??null
+            ])
+            ->where(function($query) use($params) {
+                if (isset($params['is_show'])) {
+                    $query->where('is_show', '=', $params['is_show']);
+                }
+            })
+            ->language(request()->lang_id)
+            ->order(['sort' => 'asc', 'id' => 'desc'])
+            ->select();
+
+        return success('获取成功', array_to_tree($categorys->toArray(), 0, 'pid', 1, false));
+    }
+
     /**
      * 分页数据
      */
     public function index()
     {
         $params = request()->param([
-            'name',
-            'is_show',
-            'page/d' => 1,
-            'size/d' => 10
+            'name'
         ]);
 
         $categorys = AttachmentCategoryModel::field([
                 'id',
+                'pid',
                 'name',
                 'sort',
                 'is_show'
@@ -33,23 +61,10 @@ class AttachmentCategory
                 'name' => $params['name']??null
             ])
             ->language(request()->lang_id)
-            ->order(['sort' => 'asc', 'id' => 'desc']);
-        if (!request()->has('scene')) {
-            $categorys = $categorys->paginate([
-                'list_rows' => $params['size'],
-                'page'      => $params['page']
-            ]);
-        } else if ('all' == request()->param('scene')) {
-            $categorys = $categorys->where(function($query) use($params) {
-                    if (isset($params['is_show'])) {
-                        $query->where('is_show', '=', $params['is_show']);
-                    }
-                })
-                ->select()
-                ->hidden(['sort', 'is_show']);
-        }
+            ->order(['sort' => 'asc', 'id' => 'desc'])
+            ->select();
 
-        return success('获取成功', $categorys);
+        return success('获取成功', array_to_tree($categorys->toArray(), 0, 'pid', 1, false));
     }
 
     /**
@@ -80,6 +95,7 @@ class AttachmentCategory
     public function save()
     {
         $post = request()->post([
+            'pid' => 0,
             'name',
             'sort',
             'is_show'
@@ -105,6 +121,7 @@ class AttachmentCategory
     {
         $id  = request()->param('id');
         $put = request()->put([
+            'pid' => 0,
             'name',
             'sort',
             'is_show'
diff --git a/app/admin/route/v1.php b/app/admin/route/v1.php
index cc64da0f..12bb5b96 100644
--- a/app/admin/route/v1.php
+++ b/app/admin/route/v1.php
@@ -373,12 +373,12 @@ Route::group('v1', function () {
         // 附件（下载管理）删除
         Route::delete('delete/:id', 'Attachment/delete');
 
-        // 附件（下载管理）分类列表
-        Route::get('categorys', 'AttachmentCategory/index')->append(['scene' => 'all']);
+        // 附件（下载管理）分类列表树
+        Route::get('tree', 'AttachmentCategory/tree');
 
         // 附件（下载管理）分类
         Route::group('category', function () {
-            // 附件（下载管理）分类分页
+            // 附件（下载管理）分类树
             Route::get('index', 'AttachmentCategory/index');
 
             // 附件（下载管理）分类详情
diff --git a/app/admin/validate/v1/AttachmentCategoryValidate.php b/app/admin/validate/v1/AttachmentCategoryValidate.php
index 5f2af9ac..64e4d200 100644
--- a/app/admin/validate/v1/AttachmentCategoryValidate.php
+++ b/app/admin/validate/v1/AttachmentCategoryValidate.php
@@ -3,6 +3,8 @@ declare (strict_types = 1);
 
 namespace app\admin\validate\v1;
 
+use app\admin\model\v1\AttachmentCategoryModel;
+use think\facade\Db;
 use think\Validate;
 
 class AttachmentCategoryValidate extends Validate
@@ -15,6 +17,7 @@ class AttachmentCategoryValidate extends Validate
      */
     protected $rule = [
         'id'          => 'require|integer',
+        'pid'         => 'integer|checkPidNotBeChildren',
         'language_id' => 'require|integer',
         'name'        => 'require|max:64',
         'sort'        => 'integer',
@@ -28,22 +31,50 @@ class AttachmentCategoryValidate extends Validate
      * @var array
      */
     protected $message = [
-        'id.require'            => 'ID不能为空',
-        'id.integer'            => 'ID必须是整数',
-        'language_id.require'   => '语言ID不能为空',
-        'language_id.integer'   => '语言ID必须是整数',
-        'name.require'          => '名称不能为空',
-        'name.max'              => '名称不能超过64个字符',
-        'sort.integer'          => '排序必须是整数',
-        'is_show.in'            => '是否显示必须是0或1',
+        'id.require'                => 'ID不能为空',
+        'id.integer'                => 'ID必须是整数',
+        'pid.integer'               => '父级ID必须是整数',
+        'pid.checkPidNotBeChildren' => '父级分类不能为自身或自身的子分类',
+        'language_id.require'       => '语言ID不能为空',
+        'language_id.integer'       => '语言ID必须是整数',
+        'name.require'              => '名称不能为空',
+        'name.max'                  => '名称不能超过64个字符',
+        'sort.integer'              => '排序必须是整数',
+        'is_show.in'                => '是否显示必须是0或1',
     ];
 
+    // 验证pid
+    protected function checkPidNotBeChildren($value, $rule, $data = [])
+    {
+        if ($value == 0) {
+            return true;
+        }
+        $table_name = (new AttachmentCategoryModel)->getTable();
+        $children = Db::query(
+            preg_replace(
+                '/\s+/u', 
+                ' ',
+                "WITH RECURSIVE attachment_tree_by AS (
+                    SELECT a.id, a.pid FROM $table_name a WHERE a.id = {$data['id']}
+                    UNION ALL
+                    SELECT k.id, k.pid FROM $table_name k INNER JOIN attachement_tree_by t ON t.id = k.pid
+                )
+                SELECT id FROM attachment_tree_by WHERE id <> {$data['id']};"
+            )
+        );
+        if (!empty($children) && in_array($data['pid'], array_column($children, 'id'))) {
+            return false;
+        }
+
+        return true;
+    }
+
     /**
      * 新增场景
      */
     public function sceneCreate()
     {
-        return $this->remove('id', 'require|integer');
+        return $this->remove('id', 'require|integer')->remove('pid', 'checkPidNotBeChildren');
     }
 
     /**