diff --git a/refund.go b/refund.go
index 7d810ae..b4c5d35 100644
--- a/refund.go
+++ b/refund.go
@@ -17,10 +17,10 @@ import (
 /**
  * 商户订单号,退款单号,总金额,退款金额,微信商户id,微信商户平台API私钥,平台证书,商户平台证书序列号,商品名,商品id,退款原因,回调地址
  */
-func CreateRefund(order_sn, out_refund_no, total_amount, refund__amount, wx_mp_mch_id, wx_mch_apiclient_key,
+func CreateRefund(order_sn, out_refund_no, total_amount, refund_amount, wx_mp_mch_id, wx_mch_apiclient_key,
 	wx_pay_cert, mch_serial_no, title, uuid, reason, notify_url string) (map[string]interface{}, error) {
 	total := helper.ToInt64(helper.FloatMul(total_amount, 100))    //总金额
-	refund := helper.ToInt64(helper.FloatMul(refund__amount, 100)) //退款金额
+	refund := helper.ToInt64(helper.FloatMul(refund_amount, 100)) //退款金额
 
 	log.Println("refund", order_sn, out_refund_no, refund, total, notify_url)