diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index dc8b44d1e..5e409decd 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -115,7 +115,7 @@ class Attachment < ApplicationRecord
 
   def become_history
     history = self.attachment_histories.first
-    new_attachment_history = AttachmentHistory.new(self.attributes.except("id", "resource_bank_id", "unified_setting", "course_second_category_id", "delay_publish").merge(
+    new_attachment_history = AttachmentHistory.new(self.attributes.except("id", "resource_bank_id", "unified_setting", "course_second_category_id", "delay_publish", "link").merge(
         attachment_id: self.id,
         version: history.nil? ? 1 :  history.version + 1,
     ))
@@ -123,7 +123,7 @@ class Attachment < ApplicationRecord
   end
 
   def copy_attributes_from_new_attachment(new_attachment)
-    self.attributes = new_attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads", "quotes",'is_publish','publish_time', "delay_publish")
+    self.attributes = new_attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads", "quotes",'is_publish','publish_time', "delay_publish", "link")
   end
 
   def set_public(is_public)
diff --git a/public/react/src/modules/courses/videostatistics/component/Videostatisticscom.js b/public/react/src/modules/courses/videostatistics/component/Videostatisticscom.js
index 9b859cede..a16e0ed39 100644
--- a/public/react/src/modules/courses/videostatistics/component/Videostatisticscom.js
+++ b/public/react/src/modules/courses/videostatistics/component/Videostatisticscom.js
@@ -1,7 +1,7 @@
 import React, {Component} from "react";
 import '../../signin/css/signincdi.css';
 import {Progress, message} from 'antd';
-import {getImageUrl} from 'educoder';
+import {getImageUrl,formatSeconds} from 'educoder';
 import axios from 'axios';
 
 
@@ -88,7 +88,7 @@ class Videostatisticscom extends Component {
 							<div className="yslshipingshi" style={{width:260,height:100}}>
 								<div className="ws100s verticallayout tbrt">
 									<div className="ws100 ts">总观看时长（时）</div>
-									<div className="ws100s tss">{this.props.watch_staticsdata&&this.props.watch_staticsdata.total_duration?this.props.watch_staticsdata.total_duration:0}</div>
+									<div className="ws100s tss">{this.props.watch_staticsdata&&this.props.watch_staticsdata.total_duration?formatSeconds(this.props.watch_staticsdata.total_duration):0}</div>
 								</div>
 							</div>