diff --git a/app/views/admin/messages.html.erb b/app/views/admin/messages.html.erb
index 918b09174..bd804a225 100644
--- a/app/views/admin/messages.html.erb
+++ b/app/views/admin/messages.html.erb
@@ -8,6 +8,7 @@
       <div class="field">
         <%= f.kindeditor :content, :edit_id => 'system_message', :width => '87%', :resizeType => '0', :no_label => true %>
       </div>
+      <div class="admin_message_warn">（消息内容不超过255个字符！）</div>
       <div>
         <p id="content_notice_span" class="ml55"></p>
       </div>
diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index ed274a61e..8fdb26ffc 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -2807,4 +2807,6 @@ img.school_avatar {
     width: 100px;
     height: 100px;
     max-width: none;
-}
\ No newline at end of file
+}
+
+.admin_message_warn{font-size: 12px;color: red;}
\ No newline at end of file