diff --git a/api/MtDataPromoteOrder.php b/api/MtDataPromoteOrder.php
index 98fd1323206f1daa76a69b47ff6b7673f319c7ed..2d1e93b67dc64c8cf6a09db2cf41b8b128a4c84c 100644
--- a/api/MtDataPromoteOrder.php
+++ b/api/MtDataPromoteOrder.php
@@ -56,7 +56,7 @@ class MtDataPromoteOrder extends DtkClient
      */
     public function check()
     {
-        if (!$this->orderType) {
+        if (is_null($this->orderType) || $this->orderType === "") {
             return ['orderType不能为空！', false];
         }
         return ['', true];