diff --git a/app/views/courses/show.html.erb b/app/views/courses/show.html.erb
index 57e4e06cc..c0b2f1eb6 100644
--- a/app/views/courses/show.html.erb
+++ b/app/views/courses/show.html.erb
@@ -15,7 +15,7 @@
                 <span class="fl"> <%= l(:label_new_activity) %>：</span>
                 <%= link_to "#{eventToLanguageCourse(e.event_type, @course)}: "<< format_activity_title(e.event_title), (e.event_type.eql?("attachment")&&e.container.kind_of?(Course)) ? course_files_path(e.container) : e.event_url,:class => "problem_tit c_dblue fl fb"%>
                 <br />
-                <p class="mt5"><%= e.event_description %>
+                <p class="mt5 break_word"><%= e.event_description %>
                   <br />
                   <%= l :label_activity_time %> ：  <%= format_activity_day(day) %><%= format_time(e.event_datetime, false) %>
                 </p>
diff --git a/public/stylesheets/public.css b/public/stylesheets/public.css
index d5f07dd2a..23e4bbcc0 100644
--- a/public/stylesheets/public.css
+++ b/public/stylesheets/public.css
@@ -208,6 +208,7 @@ a:hover.close_btn {background-position:-66px 0;}
 .show_btn {background-position:-119px 0;}
 .msgserver a {color:#15bccf; }
 .msgserver a:hover { text-decoration:underline; }
+.break_word{word-break: break-all;word-wrap: break-word;}
 /***** Ajax indicator ******/
 #ajax-indicator {
     position: absolute; /* fixed not supported by IE */