diff --git a/app/views/boards/show.html.erb b/app/views/boards/show.html.erb
index b53b9add1..703657767 100644
--- a/app/views/boards/show.html.erb
+++ b/app/views/boards/show.html.erb
@@ -6,6 +6,7 @@
     .ke-icon-emoticons{background-position:0px -671px;width:50px;height:26px;}
     .ke-icon-emoticons:hover{background-position:-79px -671px;width:50px;height:26px;}
     .ke-toolbar .ke-outline{border:none;}
+    .break_word {width:100%;}
 </style>
 <script type="text/javascript">
     //头部导航