diff --git a/public/react/public/css/edu-all.css b/public/react/public/css/edu-all.css
index 9f129eabc..1c19799b8 100644
--- a/public/react/public/css/edu-all.css
+++ b/public/react/public/css/edu-all.css
@@ -577,7 +577,7 @@ p .activity-item:first-child{border-top: 1px solid #eee;}
 .recently_name{float: left;line-height: 48px;display: block}
 .recently_item:hover{background-color: #F9F9F9;}
 /*私信对话框*/
-.private-list{min-height: 660px;max-height: 810px;overflow-y: auto}
+.private-list{min-height: 660px;max-height: 810px;overflow-y: auto;overflow-x: hidden;}
 .private-list .private-part{padding-left:20px;cursor: pointer}
 .private-part:hover{background-color: #F5F5F5;}
 .private-part.active{background-color: #F5F5F5;}
diff --git a/public/stylesheets/educoder/edu-all.css b/public/stylesheets/educoder/edu-all.css
index fa879a9e5..29d389202 100644
--- a/public/stylesheets/educoder/edu-all.css
+++ b/public/stylesheets/educoder/edu-all.css
@@ -580,7 +580,7 @@ p .activity-item:first-child{border-top: 1px solid #eee;}
 .recently_name{float: left;line-height: 48px;display: block}
 .recently_item:hover{background-color: #F9F9F9;}
 /*私信对话框*/
-.private-list{min-height: 660px;max-height: 810px;overflow-y: auto}
+.private-list{min-height: 660px;max-height: 810px;overflow-y: auto;overflow-x: hidden;}
 .private-list .private-part{padding-left:20px;cursor: pointer}
 .private-part:hover{background-color: #F5F5F5;}
 .private-part.active{background-color: #F5F5F5;}