diff --git a/public/assets/wechat/app.html b/public/assets/wechat/app.html
index 099384593..232f07494 100644
--- a/public/assets/wechat/app.html
+++ b/public/assets/wechat/app.html
@@ -41,6 +41,7 @@
 <script src="/javascripts/wechat/directives/at_delete_link.js"></script>
 <script src="/javascripts/wechat/directives/iphone_recognize.js"></script>
 <script src="/javascripts/wechat/directives/multi_reply.js"></script>
+<script src="/javascripts/wechat/directives/img_preview.js"></script>
 <script src="/javascripts/wechat/controllers/reg.js"></script>
 <script src="/javascripts/wechat/controllers/login.js"></script>
 <script src="/javascripts/wechat/controllers/activity.js"></script>
diff --git a/public/assets/wechat/blog_detail.html b/public/assets/wechat/blog_detail.html
index 7aa629bb7..91a5fff59 100644
--- a/public/assets/wechat/blog_detail.html
+++ b/public/assets/wechat/blog_detail.html
@@ -25,7 +25,7 @@
                     <div class="post-dynamic-title c-black fb">{{blog.title}}<img ng-if="blog.locked" src="/images/locked.png" style="display:inline-block;" /></div>
                     <div class="c-grey4 f13 mt5"><span class="mr10">博客</span><span>{{blog.created_at}}</span></div>
 
-                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="blog.content|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="blog.content|safeHtml" img-preview></div>
                     <div class="cl"></div>
                 </div>
                 <div class="fr f13">
diff --git a/public/assets/wechat/course_discussion.html b/public/assets/wechat/course_discussion.html
index 8dc08c788..7a818bb79 100644
--- a/public/assets/wechat/course_discussion.html
+++ b/public/assets/wechat/course_discussion.html
@@ -25,7 +25,7 @@
                     <div class="ml40">
                         <div class="post-dynamic-title c-black fb">{{discussion.subject}}<img ng-if="discussion.locked" src="/images/locked.png" style="display:inline-block;" /></div>
                         <div class="c-grey4 f13 mt5"><span class="mr10">{{discussion.syllabus_title}}<font class="fb" style="height:18px; line-height:18px; vertical-align:top; margin:0 3px;">·</font>{{discussion.course_project_name}} - 班级讨论区</span><span>{{discussion.created_on}}</span></div>
-                        <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="discussion.content|safeHtml"></div>
+                        <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="discussion.content|safeHtml" img-preview></div>
                         <div class="cl"></div>
                         <div class="fr f13">
                             <div ng-if="!discussion.praise_count" ng-click="addPraise(discussion);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>赞</span></div>
diff --git a/public/assets/wechat/course_notice.html b/public/assets/wechat/course_notice.html
index a0c242d72..c13a7b532 100644
--- a/public/assets/wechat/course_notice.html
+++ b/public/assets/wechat/course_notice.html
@@ -24,7 +24,7 @@
                 <div class="ml40">
                     <div class="post-dynamic-title c-black fb">{{news.title}}</div>
                     <div class="c-grey4 f13 mt5"><span class="mr10">{{news.syllabus_title}}<font class="fb" style="height:18px; line-height:18px; vertical-align:top; margin:0 3px;">·</font>{{news.course_name}} - 课程通知</span><span>{{news.created_on}}</span></div>
-                    <div class="f13 c-black mt5 text-control  post-all-content" ng-bind-html="news.description|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control  post-all-content" ng-bind-html="news.description|safeHtml" img-preview></div>
                     <div class="cl"></div>
                     <div class="fr f13">
                         <div ng-if="!news.praise_count" ng-click="addPraise(news);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>赞</span></div>
diff --git a/public/assets/wechat/homework_detail.html b/public/assets/wechat/homework_detail.html
index 908cff977..161c3be94 100644
--- a/public/assets/wechat/homework_detail.html
+++ b/public/assets/wechat/homework_detail.html
@@ -24,7 +24,7 @@
                 <div class="ml40">
                     <div class="post-dynamic-title c-black fb">{{homework.name}}</div>
                     <div class="c-grey4 mt5 f13"><span class="mr10">{{homework.syllabus_title}}<font class="fb" style="height:18px; line-height:18px; vertical-align:top; margin:0 3px;">·</font>{{homework.course_name}} - <span ng-if="homework.homework_type == 1">普通作业</span><span ng-if="homework.homework_type == 2">编程作业</span><span ng-if="homework.homework_type == 3">分组作业</span></span><span>{{homework.publish_time}}</span></div>
-                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="homework.description|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="homework.description|safeHtml" img-preview></div>
                     <span class="c-grey f12 mr15">迟交扣分：{{homework.late_penalty}}分</span>
                     <span ng-if="!homework.anonymous_comment" class="c-grey f12">匿评开启时间：{{homework.evaluation_start}}</span><br />
                     <span ng-if="!homework.anonymous_comment" class="c-grey f12 mr15">缺评扣分：{{homework.absence_penalty}}分/作品</span>
diff --git a/public/assets/wechat/issue_detail.html b/public/assets/wechat/issue_detail.html
index f4eed4bd9..278b545a5 100644
--- a/public/assets/wechat/issue_detail.html
+++ b/public/assets/wechat/issue_detail.html
@@ -26,7 +26,7 @@
                     <div class="post-dynamic-title c-black fb">{{issue.subject}}</div>
                     <div class="c-grey4 f13 mt5"><span class="mr10">{{issue.project_name}} - 项目问题</span><span>{{issue.created_on}}</span></div>
 
-                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="issue.description|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="issue.description|safeHtml" img-preview></div>
                     <span class="c-grey f12 mr15">状&nbsp;&nbsp;&nbsp;态：{{issue.issue_status}}</span>
                     <span class="c-grey f12">优先级：{{issue.issue_priority}}</span><br/>
                     <span class="c-grey f12 mr15">指派给：{{issue.issue_assigned_to}}</span>
diff --git a/public/assets/wechat/jour_message_detail.html b/public/assets/wechat/jour_message_detail.html
index a1db224a6..736ad419b 100644
--- a/public/assets/wechat/jour_message_detail.html
+++ b/public/assets/wechat/jour_message_detail.html
@@ -24,7 +24,7 @@
                 <div class="ml40">
                     <div class="c-grey4 f13 mt5"><span class="mr10">留言</span><span>{{message.created_on}}</span></div>
 
-                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="message.content|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="message.content|safeHtml" img-preview></div>
                     <div class="cl"></div>
                     <div class="fr f13">
                         <div ng-if="!message.praise_count" ng-click="addPraise(message);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>赞</span></div>
diff --git a/public/assets/wechat/project_discussion.html b/public/assets/wechat/project_discussion.html
index dcb5a68a6..7fca33657 100644
--- a/public/assets/wechat/project_discussion.html
+++ b/public/assets/wechat/project_discussion.html
@@ -25,7 +25,7 @@
                     <div class="post-dynamic-title c-black fb">{{discussion.subject}}<img ng-if="discussion.locked" src="/images/locked.png" style="display:inline-block;" /></div>
                     <div class="c-grey4 f13 mt5"><span class="mr10">{{discussion.course_project_name}} - 项目讨论区</span><span>{{discussion.created_on}}</span></div>
 
-                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="discussion.content|safeHtml"></div>
+                    <div class="f13 c-black mt5 text-control post-all-content" ng-bind-html="discussion.content|safeHtml" img-preview></div>
                     <div class="cl"></div>
                     <div class="fr f13">
                         <div ng-if="!discussion.praise_count" ng-click="addPraise(discussion);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>赞</span></div>
diff --git a/public/javascripts/wechat/directives/img_preview.js b/public/javascripts/wechat/directives/img_preview.js
new file mode 100644
index 000000000..08f33d381
--- /dev/null
+++ b/public/javascripts/wechat/directives/img_preview.js
@@ -0,0 +1,22 @@
+/**
+ * Created by ttang on 2016/9/20.
+ */
+app.directive('imgPreview',["$timeout",'wx',function(timer,wx){
+    return{
+        restrict: 'A',
+        scope: {},
+        link: function(scope, element){
+            timer(function(){
+                var srcList = [];
+                $.each($(".post-all-content img"),function(i,item){
+                    if(item.src){
+                        srcList.push(item.src);
+                        $(item).click(function(e){
+                            wx.previewImage(this.src,srcList);
+                        });
+                    }
+                });
+            })
+        }
+    }
+}]);
\ No newline at end of file