diff --git a/services/cs/user.go b/services/cs/user.go
index d65581b..81a8b56 100644
--- a/services/cs/user.go
+++ b/services/cs/user.go
@@ -130,6 +130,7 @@ type SendSmsResp struct {
 
 type SendSmsRequest struct {
 	*requests.JsonRequest
+	Phone string `position:"Json" field:"phone"`
 }
 type SendSmsResponse struct {
 	*responses.BaseResponse
@@ -141,9 +142,10 @@ type SendSmsResponse struct {
 func CreateSendSmsRequest(param SendSmsReq) (req *SendSmsRequest) {
 	req = &SendSmsRequest{
 		JsonRequest: &requests.JsonRequest{},
+		Phone:       param.Phone,
 	}
 	req.InitWithApiInfo(HOST, VERSION, "/v1/user/send_sms")
-	req.JsonParams["phone"] = param.Phone
+
 	req.Method = requests.POST
 	return
 }