diff --git a/media/css/spreadsheet_convert.css b/media/css/spreadsheet_convert.css
index 3eef2d8100..3e7343c7f2 100644
--- a/media/css/spreadsheet_convert.css
+++ b/media/css/spreadsheet_convert.css
@@ -1,8 +1,10 @@
 
 #spreadsheet-container iframe {
+    width: 950px;
+    background:#fff;
+    border:none;
     margin: auto;
-    max-width: 800px;
     min-height: 500px;
     max-height: 1000px;
     overflow: auto;
-};
\ No newline at end of file
+};
diff --git a/seahub/templates/snippets/spreadsheet_convert_html.html b/seahub/templates/snippets/spreadsheet_convert_html.html
index 518a1e4124..952bdfb63c 100644
--- a/seahub/templates/snippets/spreadsheet_convert_html.html
+++ b/seahub/templates/snippets/spreadsheet_convert_html.html
@@ -1,5 +1,5 @@
 {% load i18n %}
-<div id="convert-loading">
+<div id="convert-loading" class="alc">
   <img src="{{ MEDIA_URL }}img/loading-icon.gif" alt="" class="vam" />
   <span class="loading-text vam">{% trans "The file is being processed, please wait..." %}</span>
 </div>