diff --git a/app/admin/validate/v1/NavigationItemValidate.php b/app/admin/validate/v1/NavigationItemValidate.php
index bf2dbff7..4da9e1bb 100644
--- a/app/admin/validate/v1/NavigationItemValidate.php
+++ b/app/admin/validate/v1/NavigationItemValidate.php
@@ -3,6 +3,8 @@ declare (strict_types = 1);
 
 namespace app\admin\validate\v1;
 
+use app\admin\model\v1\SysNavigationItemModel;
+use think\facade\Db;
 use think\Validate;
 
 class NavigationItemValidate extends Validate
@@ -16,7 +18,7 @@ class NavigationItemValidate extends Validate
     protected $rule = [
         'id'        => 'require|integer',
         'nav_id'    => 'require|integer',
-        'pid'       => 'integer',
+        'pid'       => 'integer|different:id|checkPidNotBeChildren',
         'name'      => 'require|max:64',
         'icon'      => 'max:64',
         'link_type' => 'require|integer',
@@ -33,23 +35,51 @@ class NavigationItemValidate extends Validate
      * @var array
      */
     protected $message = [
-        'id.require'        => 'ID不能为空',
-        'id.integer'        => 'ID必须为整数',
-        'nav_id.require'    => '导航ID不能为空',
-        'nav_id.integer'    => '导航ID必须为整数',
-        'pid.integer'       => '父级ID必须为整数',
-        'name.require'      => '导航名称不能为空',
-        'name.max'          => '导航名称最多不能超过64个字符',
-        'icon.max'          => '图标最多不能超过64个字符',
-        'link_type.require' => '链接类型不能为空',
-        'link_type.integer' => '链接类型必须为整数',
-        'link.max'          => '链接最多不能超过255个字符',
-        'sort.integer'      => '排序必须为整数',
-        'blank.in'          => '是否新窗口打开只能是0或1',
-        'status.require'    => '状态不能为空',
-        'status.in'         => '状态只能是1或-1',
+        'id.require'                => 'ID不能为空',
+        'id.integer'                => 'ID必须为整数',
+        'nav_id.require'            => '导航ID不能为空',
+        'nav_id.integer'            => '导航ID必须为整数',
+        'pid.integer'               => '父级ID必须为整数',
+        'pid.different'             => '父级ID不能为自身',
+        'pid.checkPidNotBeChildren' => '父级ID不能为自身的子导航',
+        'name.require'              => '导航名称不能为空',
+        'name.max'                  => '导航名称最多不能超过64个字符',
+        'icon.max'                  => '图标最多不能超过64个字符',
+        'link_type.require'         => '链接类型不能为空',
+        'link_type.integer'         => '链接类型必须为整数',
+        'link.max'                  => '链接最多不能超过255个字符',
+        'sort.integer'              => '排序必须为整数',
+        'blank.in'                  => '是否新窗口打开只能是0或1',
+        'status.require'            => '状态不能为空',
+        'status.in'                 => '状态只能是1或-1',
     ];
 
+    // 验证pid
+    protected function checkPidNotBeChildren($value, $rule, $data = [])
+    {
+        if ($value == 0) {
+            return true;
+        }
+        $table_name = (new SysNavigationItemModel)->getTable();
+        $children = Db::query(
+            preg_replace(
+                '/\s+/u', 
+                ' ',
+                "WITH RECURSIVE 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 $table_name k INNER JOIN tree_by t ON t.id = k.pid
+                )
+                SELECT id FROM tree_by WHERE id <> {$data['id']};"
+            )
+        );
+        if (!empty($children) && in_array($data['pid'], array_column($children, 'id'))) {
+            return false;
+        }
+
+        return true;
+    }
+
     // 定义场景
     protected $scene = [
         'add'  => ['nav_id', 'pid', 'name', 'icon', 'link_type', 'link', 'sort', 'blank', 'status'],