diff --git a/application/admin/controller/system/SystemDatabackup.php b/application/admin/controller/system/SystemDatabackup.php
index 466ae853..0f256d9f 100644
--- a/application/admin/controller/system/SystemDatabackup.php
+++ b/application/admin/controller/system/SystemDatabackup.php
@@ -119,8 +119,8 @@ class SystemDatabackup extends AuthController
      */
     public function import(Request $request = null)
     {
-        $part = $request->post('part') ? intval($request->post('part')) :null;
-        $start = $request->post('start') === '0' ? intval($request->post('part')) : null;
+        $part = $request->post('part') != '' ? intval($request->post('part')) :null;
+        $start = $request->post('start') != '' ? intval($request->post('start')) : null;
         $time = intval($request->post('time'));
         $db = $this->DB;
         if(is_numeric($time) && is_null($part) && is_null($start)){