diff --git a/service/pay.go b/service/pay.go
index 34152d7..ac6b50c 100644
--- a/service/pay.go
+++ b/service/pay.go
@@ -25,7 +25,7 @@ func NewPay() *Pay {
 
 func (p *Pay) Pay(corp *model.Corp, user *model.StaffUser, title, payType string, amount int64, outTradeNo string) error {
 	if outTradeNo == "" {
-		outTradeNo = fmt.Sprintf("%d_%s_%d", corp.Id, time.Now().Format("200601020304"), user.Id)
+		outTradeNo = fmt.Sprintf("%d_%s_%d", corp.Id, time.Now().UnixNano(), user.Id)
 	}
 
 	plog, err := dao.NewStaffPayLogDao().GetByOutTradeNo(outTradeNo)