diff --git a/extend/payment/Baidu.php b/extend/payment/Baidu.php
index d9d24dbd73ac5f2765b9c09d1bc02d6421149a96..9f8bc74d979c99951b220f840e82afa07ec07eee 100644
--- a/extend/payment/Baidu.php
+++ b/extend/payment/Baidu.php
@@ -155,7 +155,7 @@ class Baidu
             'tpOrderId'         => $params['order_no'],
             'dealTitle'         => $params['name'],
             'signFieldsRange'   => 1,
-            'bizInfo'           => json_encode([], JSON_UNESCAPED_UNICODE),
+            'bizInfo'           => '',
         ];
         $data['rsaSign'] = $this->SignWithRsa($data);