diff --git a/platformapi/wxpayapi/wxpayapi.go b/platformapi/wxpayapi/wxpayapi.go
index d75d3a6d..fd867cff 100644
--- a/platformapi/wxpayapi/wxpayapi.go
+++ b/platformapi/wxpayapi/wxpayapi.go
@@ -54,6 +54,14 @@ const (
 	AccountTypeOpen = "PERSONAL_OPENID"
 )
 
+var (
+	specialSignActions = map[string]string{
+		"secapi/pay/multiprofitsharing":   "secapi/pay/multiprofitsharing",
+		"pay/profitsharingaddreceiver":    "pay/profitsharingaddreceiver",
+		"pay/profitsharingremovereceiver": "pay/profitsharingremovereceiver",
+	}
+)
+
 type API struct {
 	appID  string
 	appKey string
@@ -429,11 +437,14 @@ func (a *API) AccessAPI(action string, requestParam IRequestBase) (retVal map[st
 	requestParam.SetMchID(action, a.mchID)
 	requestParam.SetNonceStr(utils.GetUUID())
 	var sigType string
-	if action == specialAction {
+	if specialSignActions[action] != "" {
 		sigType = sigTypeSha256
 		requestParam.SetSignType(sigType)
+	} else if action == specialAction {
+		sigType = sigTypeMd5
 	} else {
 		sigType = sigTypeMd5
+		requestParam.SetSignType(sigType)
 	}
 	signStr := a.signParam(sigType, utils.Struct2FlatMap(requestParam))
 	requestParam.SetSign(signStr)