diff --git a/services/pay/complaint_complete.go b/services/pay/complaint_complete.go
index 29d7bca..74d5d62 100644
--- a/services/pay/complaint_complete.go
+++ b/services/pay/complaint_complete.go
@@ -7,9 +7,9 @@ import (
 
 type ComplaintCompleteRequest struct {
 	*requests.RpcRequest
-	MchId       string            `position:"Body" field:"mch_id" default:"" `
-	ComplaintId string            `position:"Body" field:"complaint_id" default:"" `
-	ExtData     map[string]string `position:"Body" field:"ext_data" default:"" `
+	MchId       string `position:"Body" field:"mch_id" default:"" `
+	ComplaintId string `position:"Body" field:"complaint_id" default:"" `
+	ExtData     string `position:"Body" field:"ext_data" default:"" `
 }
 
 type ComplaintCompleteResponse struct {