diff --git a/app/helpers/praise_tread_helper.rb b/app/helpers/praise_tread_helper.rb
index 90ce6d61d..c142f0973 100644
--- a/app/helpers/praise_tread_helper.rb
+++ b/app/helpers/praise_tread_helper.rb
@@ -20,9 +20,9 @@ module PraiseTreadHelper
       # when 0
         # return @record.tread_num.nil? ? 0 : @record.tread_num
       # end
-      return (@record.praise_num.to_i-@record.tread_num.to_i)
+      return ((@record.praise_num.nil? ? 0 : @record.praise_num.to_i)-(@record.tread_num.nil? ? 0 : @record.tread_num.to_i))
     else
-    return 0
+      return 0
     end
   end
 
diff --git a/app/views/memos/show.html.erb b/app/views/memos/show.html.erb
index 55a2410b0..586279504 100644
--- a/app/views/memos/show.html.erb
+++ b/app/views/memos/show.html.erb
@@ -7,7 +7,9 @@
 <%= javascript_include_tag "/assets/kindeditor/kindeditor",'/assets/kindeditor/pasteimg'  %>
 <div class="lz">
   <!-- 在这里添加赞和踩-->
-  <span id="praise_tread" style="float: right"> <%= render :partial => "/praise_tread/praise_tread",:locals => {:obj => @memo,:show_flag => true,:user_id =>User.current.id,:horizontal => true}%> </span>
+  <span id="praise_tread" style="float: right">
+    <%= render :partial => "/praise_tread/praise_tread",:locals => {:obj => @memo,:show_flag => true,:user_id =>User.current.id,:horizontal => true}%>
+  </span>
 	<div class="lz-left">
 		<div>
           <%= link_to image_tag(url_to_avatar(@memo.author), :class => "avatar"), user_path(@memo.author) %>