diff --git a/ThinkPHP/Library/Org/OuterPay/AlipayApi.class.php b/ThinkPHP/Library/Org/OuterPay/AlipayApi.class.php
index 6734968..a815944 100644
--- a/ThinkPHP/Library/Org/OuterPay/AlipayApi.class.php
+++ b/ThinkPHP/Library/Org/OuterPay/AlipayApi.class.php
@@ -22,7 +22,7 @@ class AlipayApi
         $params['pay_amount'] = (int)($data["price"] * 100);
         $params['notify_url'] = $notifyUrl;
         $params['return_url'] = $returnUrl;
-        $params['subject'] = '消费#' . $data["pay_order_number"] . "#";
+        $params['subject'] = '消费_' . $data["pay_order_number"];
         return self::request($url, $params);
     }