diff --git a/demo-album/lib/cos-wx-sdk-v5.js b/demo-album/lib/cos-wx-sdk-v5.js
index e331f03..dfbab8b 100644
--- a/demo-album/lib/cos-wx-sdk-v5.js
+++ b/demo-album/lib/cos-wx-sdk-v5.js
@@ -9892,7 +9892,7 @@ function uploadFile(params, callback) {
   var SliceSize = params.SliceSize === undefined ? self.options.SliceSize : params.SliceSize;
 
   var taskList = [];
-  // util.each(params.files, function (fileParams, index) {
+
   var FileSize = params.FileSize;
   var fileInfo = {TaskId: ''};
 
diff --git a/demo/lib/cos-wx-sdk-v5.js b/demo/lib/cos-wx-sdk-v5.js
index e331f03..dfbab8b 100644
--- a/demo/lib/cos-wx-sdk-v5.js
+++ b/demo/lib/cos-wx-sdk-v5.js
@@ -9892,7 +9892,7 @@ function uploadFile(params, callback) {
   var SliceSize = params.SliceSize === undefined ? self.options.SliceSize : params.SliceSize;
 
   var taskList = [];
-  // util.each(params.files, function (fileParams, index) {
+
   var FileSize = params.FileSize;
   var fileInfo = {TaskId: ''};
 
diff --git a/src/advance.js b/src/advance.js
index 8322f6c..090a730 100644
--- a/src/advance.js
+++ b/src/advance.js
@@ -810,7 +810,7 @@ function uploadFile(params, callback) {
   var SliceSize = params.SliceSize === undefined ? self.options.SliceSize : params.SliceSize;
 
   var taskList = [];
-  // util.each(params.files, function (fileParams, index) {
+
   var FileSize = params.FileSize;
   var fileInfo = {TaskId: ''};