diff --git a/services/pay/invoice.go b/services/pay/invoice.go
index 963038d..c5c35f6 100644
--- a/services/pay/invoice.go
+++ b/services/pay/invoice.go
@@ -15,27 +15,29 @@ type InvoiceRequestOrder struct {
 
 // InvoiceRequestParam 申请开发票参数
 type InvoiceRequestParam struct {
-	UserName    string                `json:"user_name"`
-	BuyerName   string                `json:"buyer_name"`
-	Email       string                `json:"email"`
-	Phone       string                `json:"phone"`
-	RequestName string                `json:"request_name"`
-	From        string                `json:"from"`
-	BatchFilter string                `json:"batch_filter"` // 批量开票圈选条件快照(JSON)，单个开票留空
-	Orders      []InvoiceRequestOrder `json:"orders"`
+	UserName       string                `json:"user_name"`
+	BuyerName      string                `json:"buyer_name"`
+	Email          string                `json:"email"`
+	Phone          string                `json:"phone"`
+	RequestName    string                `json:"request_name"`
+	From           string                `json:"from"`
+	BatchFilter    string                `json:"batch_filter"`     // 批量开票圈选条件快照(JSON)，单个开票留空
+	MergeBySubject int64                 `json:"merge_by_subject"` // 是否同主体合并开票 0否 1是；申请单创建时锁定，审核时按此分组
+	Orders         []InvoiceRequestOrder `json:"orders"`
 }
 
 // InvoiceRequestRequest 申请开发票请求
 type InvoiceRequestRequest struct {
 	*requests.JsonRequest
-	UserName    string                `position:"Json" field:"user_name"`
-	BuyerName   string                `position:"Json" field:"buyer_name"`
-	Email       string                `position:"Json" field:"email"`
-	Phone       string                `position:"Json" field:"phone"`
-	RequestName string                `position:"Json" field:"request_name"`
-	From        string                `position:"Json" field:"from"`
-	BatchFilter string                `position:"Json" field:"batch_filter"`
-	Orders      []InvoiceRequestOrder `position:"Json" field:"orders"`
+	UserName       string                `position:"Json" field:"user_name"`
+	BuyerName      string                `position:"Json" field:"buyer_name"`
+	Email          string                `position:"Json" field:"email"`
+	Phone          string                `position:"Json" field:"phone"`
+	RequestName    string                `position:"Json" field:"request_name"`
+	From           string                `position:"Json" field:"from"`
+	BatchFilter    string                `position:"Json" field:"batch_filter"`
+	MergeBySubject int64                 `position:"Json" field:"merge_by_subject"`
+	Orders         []InvoiceRequestOrder `position:"Json" field:"orders"`
 }
 
 // InvoiceRequestResponse 申请开发票响应
@@ -48,15 +50,16 @@ type InvoiceRequestResponse struct {
 // CreateInvoiceRequestRequest 创建申请开发票请求
 func CreateInvoiceRequestRequest(param InvoiceRequestParam) *InvoiceRequestRequest {
 	req := &InvoiceRequestRequest{
-		JsonRequest: &requests.JsonRequest{},
-		UserName:    param.UserName,
-		BuyerName:   param.BuyerName,
-		Email:       param.Email,
-		Phone:       param.Phone,
-		RequestName: param.RequestName,
-		From:        param.From,
-		BatchFilter: param.BatchFilter,
-		Orders:      param.Orders,
+		JsonRequest:    &requests.JsonRequest{},
+		UserName:       param.UserName,
+		BuyerName:      param.BuyerName,
+		Email:          param.Email,
+		Phone:          param.Phone,
+		RequestName:    param.RequestName,
+		From:           param.From,
+		BatchFilter:    param.BatchFilter,
+		MergeBySubject: param.MergeBySubject,
+		Orders:         param.Orders,
 	}
 	req.InitWithApiInfo(HOST, VERSION, "/api/invoice/request")
 	req.Method = requests.POST