diff --git a/platformapi/dingdingapi/dingdingapi.go b/platformapi/dingdingapi/dingdingapi.go
index aa48ed83..9883b400 100644
--- a/platformapi/dingdingapi/dingdingapi.go
+++ b/platformapi/dingdingapi/dingdingapi.go
@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"crypto/hmac"
 	"crypto/sha256"
+	"encoding/base64"
 	"net/http"
+	"net/url"
 	"strings"
 	"sync"
 	"time"
@@ -90,7 +92,7 @@ func (a *API) RetrieveToken() (token string, err error) {
 func (a *API) signParams(timestamp int64) string {
 	mac := hmac.New(sha256.New, []byte(a.GetSecret()))
 	mac.Write([]byte(utils.Int64ToStr(timestamp)))
-	return string(mac.Sum(nil))
+	return url.QueryEscape(base64.StdEncoding.EncodeToString(mac.Sum(nil)))
 }
 
 func (a *API) AccessAPI(action string, params map[string]interface{}, bodyMap map[string]interface{}) (retVal map[string]interface{}, err error) {