diff --git a/sdk/requests/json_request.go b/sdk/requests/json_request.go
index d05de34..4e6b866 100644
--- a/sdk/requests/json_request.go
+++ b/sdk/requests/json_request.go
@@ -40,7 +40,11 @@ func (request *JsonRequest) GetStyle() string {
 
 func (request *JsonRequest) BuildQueries() string {
 	path := strings.TrimLeft(strings.TrimSpace(request.GetActionName()), "/")
-	request.queries = "/" + path + "?" + utils.GetUrlFormedMap(request.QueryParams)
+	mod := "&"
+	if !strings.Contains(path, "?") {
+		mod = "?"
+	}
+	request.queries = "/" + path + mod + utils.GetUrlFormedMap(request.QueryParams)
 	return request.queries
 }
 
diff --git a/services/oss/client_test.go b/services/oss/client_test.go
index daafc0a..e9d37fa 100644
--- a/services/oss/client_test.go
+++ b/services/oss/client_test.go
@@ -43,10 +43,16 @@ func TestUpload_Del(t *testing.T) {
 
 func TestCreateInitMultipartUpload(t *testing.T) {
 	req := CreateInitMultipartUploadRequest()
-	req.Filepath = "test.jpg"
+
+	extInfo := map[string]any{"game_byname": "tech_test_tencent"}
+	bExtInfo, _ := json.Marshal(extInfo)
+
+	req.UploadType = "package"
 	req.TargetType = "oss"
 	req.TargetName = "image"
 	req.FileHash = "51c68615b8d21f9b72b02f48c400cb87"
+	req.Filepath = "q5-01.zip"
+	req.ExtInfo = string(bExtInfo)
 	client, err := NewClient()
 	if err != nil {
 		t.Error(err)
diff --git a/services/oss/multipart_init.go b/services/oss/multipart_init.go
index afb18a6..1d0c94d 100644
--- a/services/oss/multipart_init.go
+++ b/services/oss/multipart_init.go
@@ -15,10 +15,12 @@ const (
 
 type InitMultipartUploadRequest struct {
 	*requests.JsonRequest
-	Filepath   string `position:"Body" field:"filepath"`
+	UploadType string `position:"Body" field:"upload_type"`
 	TargetType string `position:"Body" field:"target_type"`
 	TargetName string `position:"Body" field:"target_name"`
 	FileHash   string `position:"Body" field:"file_hash"`
+	Filepath   string `position:"Body" field:"filepath"`
+	ExtInfo    string `position:"Body" field:"ext_info"`
 }
 
 type InitMultipartUploadResponse struct {
@@ -50,7 +52,7 @@ func CreateInitMultipartUploadRequest() (req *InitMultipartUploadRequest) {
 		JsonRequest: &requests.JsonRequest{},
 	}
 
-	req.InitWithApiInfo(HOST, VERSION, "/api/upload/multipart/init?ts="+ts+"&sign="+sign)
+	req.InitWithApiInfo(HOST, VERSION, "/api/upload/multipart/init?_ts="+ts+"&_sign="+sign)
 	return
 }