diff --git a/common.go b/common.go
index 72df163..a69b676 100644
--- a/common.go
+++ b/common.go
@@ -84,7 +84,6 @@ type MpOpenidRes struct {
 type MpUserInfoReq struct {
 	AccessToken		string
 	Openid			string
-	Lang			string
 }
 
 /**
diff --git a/mp_userinfo.client.go b/mp_userinfo.client.go
index e09a1cd..91b0c8f 100644
--- a/mp_userinfo.client.go
+++ b/mp_userinfo.client.go
@@ -20,7 +20,6 @@ func GetMpUserInfo(accessToken,openId string,url ...string) (*MpUserInfoRes, err
 	data := MpUserInfoReq{}
 	data.AccessToken = accessToken
 	data.Openid = openId
-	data.Lang = "zh_CN"
 
 	data_json, err := json.Marshal(data)
 	if err != nil {