diff --git a/webapp/controller/OutAppMintController.class.php b/webapp/controller/OutAppMintController.class.php
index e021ab52..b4c1e0c5 100644
--- a/webapp/controller/OutAppMintController.class.php
+++ b/webapp/controller/OutAppMintController.class.php
@@ -29,6 +29,15 @@ class OutAppMintController extends BaseController {
             'accoutn_id' => $accountId,
            'uuid' => $uniid
         )));
+        $userDb = User::find($accountId);
+        if (empty($userDb)) {
+            myself()->_rspErr(1, 'user not found');
+            return;
+        }
+        if ($userDb['gold'] < 0) {
+            myself()->_rspErr(1, 'is valid user');
+            return;
+        }
         $heroDb = Hero::findByAccountIdEx($accountId, $uniid);
         if (!$heroDb) {
             myself()->_rspErr(1, 'hero not found');