diff --git a/services/pay/invoice.go b/services/pay/invoice.go
index db4d8e7..323cbf4 100644
--- a/services/pay/invoice.go
+++ b/services/pay/invoice.go
@@ -16,7 +16,9 @@ type InvoiceRequestOrder struct {
 // InvoiceRequestParam 申请开发票参数
 type InvoiceRequestParam struct {
 	UserName       string                `json:"user_name"`
+	BuyerType      int64                 `json:"buyer_type"` // 0/1=个人，2=企业
 	BuyerName      string                `json:"buyer_name"`
+	BuyerTaxNo     string                `json:"buyer_tax_no"` // 企业购方税号
 	Email          string                `json:"email"`
 	Phone          string                `json:"phone"`
 	RequestName    string                `json:"request_name"`
@@ -30,7 +32,9 @@ type InvoiceRequestParam struct {
 type InvoiceRequestRequest struct {
 	*requests.JsonRequest
 	UserName       string                `position:"Json" field:"user_name"`
+	BuyerType      int64                 `position:"Json" field:"buyer_type"`
 	BuyerName      string                `position:"Json" field:"buyer_name"`
+	BuyerTaxNo     string                `position:"Json" field:"buyer_tax_no"`
 	Email          string                `position:"Json" field:"email"`
 	Phone          string                `position:"Json" field:"phone"`
 	RequestName    string                `position:"Json" field:"request_name"`
@@ -52,7 +56,9 @@ func CreateInvoiceRequestRequest(param InvoiceRequestParam) *InvoiceRequestReque
 	req := &InvoiceRequestRequest{
 		JsonRequest:    &requests.JsonRequest{},
 		UserName:       param.UserName,
+		BuyerType:      param.BuyerType,
 		BuyerName:      param.BuyerName,
+		BuyerTaxNo:     param.BuyerTaxNo,
 		Email:          param.Email,
 		Phone:          param.Phone,
 		RequestName:    param.RequestName,
diff --git a/services/pay/invoice_test.go b/services/pay/invoice_test.go
new file mode 100644
index 0000000..a4c05c2
--- /dev/null
+++ b/services/pay/invoice_test.go
@@ -0,0 +1,54 @@
+package pay
+
+import (
+	"encoding/json"
+	"io"
+	"testing"
+
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
+)
+
+func TestCreateInvoiceRequestRequestBuyerFields(t *testing.T) {
+	tests := []struct {
+		name       string
+		buyerType  int64
+		buyerName  string
+		buyerTaxNo string
+	}{
+		{name: "企业抬头", buyerType: 2, buyerName: "测试企业", buyerTaxNo: "91310100MA1K123456"},
+		{name: "个人抬头", buyerType: 1, buyerName: "张三"},
+		{name: "旧版个人抬头", buyerName: "张三"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := CreateInvoiceRequestRequest(InvoiceRequestParam{
+				BuyerType:  tt.buyerType,
+				BuyerName:  tt.buyerName,
+				BuyerTaxNo: tt.buyerTaxNo,
+			})
+			initErr := requests.InitParam(req)
+			if initErr != nil {
+				t.Fatal(initErr)
+			}
+			body, readErr := io.ReadAll(req.GetBodyReader())
+			if readErr != nil {
+				t.Fatal(readErr)
+			}
+			var payload map[string]any
+			decodeErr := json.Unmarshal(body, &payload)
+			if decodeErr != nil {
+				t.Fatal(decodeErr)
+			}
+			if payload["buyer_type"] != float64(tt.buyerType) || payload["buyer_name"] != tt.buyerName {
+				t.Fatalf("抬头字段不匹配：%s", body)
+			}
+			if tt.buyerTaxNo != "" && payload["buyer_tax_no"] != tt.buyerTaxNo {
+				t.Fatalf("购方税号未透传：%s", body)
+			}
+			if tt.buyerTaxNo == "" && payload["buyer_tax_no"] != nil {
+				t.Fatalf("个人抬头不应携带购方税号：%s", body)
+			}
+		})
+	}
+}