diff --git a/extend/payment/Alipay.php b/extend/payment/Alipay.php
index 17a51244eb9779a62fd4d376c4959aa23e0d1c5d..3d918f945db133a0885bd252b4f3d62b47a9c518 100755
--- a/extend/payment/Alipay.php
+++ b/extend/payment/Alipay.php
@@ -321,7 +321,7 @@ class Alipay
         $parameter = array(
             'service'           => 'create_direct_pay_by_user',
             'partner'           => $this->config['partner'],
-            '_input_charset'    => C('DEFAULT_CHARSET'),
+            '_input_charset'    => 'utf-8',
             'notify_url'        => $params['notify_url'],
             'return_url'        => $params['call_back_url'],