diff --git a/src/plugin/admin/app/controller/Crud.php b/src/plugin/admin/app/controller/Crud.php
index a2f55dad..9cfb6923 100644
--- a/src/plugin/admin/app/controller/Crud.php
+++ b/src/plugin/admin/app/controller/Crud.php
@@ -274,7 +274,7 @@ protected function doUpdate($id, $data)
     protected function inputFilter(array $data): array
     {
         $table = config('plugin.admin.database.connections.mysql.prefix') . $this->model->getTable();
-        $allow_column = Util::db()->select("desc `$table`");
+        $allow_column = $this->model->getConnection()->select("desc `$table`");
         if (!$allow_column) {
             throw new BusinessException('表不存在', 2);
         }