diff --git a/public/react/src/modules/courses/busyWork/CommonWorkAppraise.js b/public/react/src/modules/courses/busyWork/CommonWorkAppraise.js
index fdd0de05a..60194c744 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkAppraise.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkAppraise.js
@@ -45,13 +45,6 @@ class CommonWorkAppraise extends Component{
   }
   exportMdtoHtml=(md)=> {
     let newmd=md;
-    newmd=newmd.replace(/TOC/g, '');
-    newmd=newmd.replace(/\[|]/g,'');
-    newmd=newmd.replace(/`/g, '');
-    newmd=newmd.replace(/`/g, '');
-    newmd=newmd.replace(/"/g, '');
-    newmd=newmd.replace(/"/g, '');
-    newmd=newmd.replace(/"/g, '');
     const converter = new showdown.Converter({
       extensions: [
         showdownKatex({
@@ -182,7 +175,7 @@ class CommonWorkAppraise extends Component{
             <div className={"color-grey-6 mb15 font-16"}>
               内容
             </div>
-            <div className="markdown-body ml20" dangerouslySetInnerHTML={{__html: this.exportMdtoHtml(description)}}>
+            <div className="markdown-body ml20" dangerouslySetInnerHTML={{__html: markdownToHTML(description)}}>
             </div>
 
             {attachments.map((item,key)=>{
diff --git a/public/react/src/modules/courses/common/comments/CCommentItem.js b/public/react/src/modules/courses/common/comments/CCommentItem.js
index 4a399b11f..486a4d8f3 100644
--- a/public/react/src/modules/courses/common/comments/CCommentItem.js
+++ b/public/react/src/modules/courses/common/comments/CCommentItem.js
@@ -160,13 +160,6 @@ class CCommentItem extends Component{
 
   exportMdtoHtml=(md)=> {
   	let newmd=md;
-		newmd=newmd.replace(/TOC/g, '');
-		newmd=newmd.replace(/\[|]/g,'');
-		newmd=newmd.replace(/`/g, '');
-		newmd=newmd.replace(/`/g, '');
-		newmd=newmd.replace(/"/g, '');
-		newmd=newmd.replace(/"/g, '');
-		newmd=newmd.replace(/"/g, '');
 		const converter = new showdown.Converter({
 			extensions: [
 				showdownKatex({
@@ -269,7 +262,7 @@ class CCommentItem extends Component{
 								<div className="comment_content  clearfix" id={`reply_content_${item.id}`}>
 									<div className="color-grey-3" id={`reply_content_${item.id}`}>
 										<div  className={"markdown-body"}
-												dangerouslySetInnerHTML={{__html:this.exportMdtoHtml(item.content)}}></div>
+												dangerouslySetInnerHTML={{__html:markdownToHTML(item.content)}}></div>
 										<div className="cl"></div>
 									</div>
 								</div>
@@ -285,7 +278,7 @@ class CCommentItem extends Component{
   render(){
     let { item, commentIndex, homework_status, is_author }=this.props;
     let { show_reply, show_appeal }=this.state;
-    const _content = item.content ? this.exportMdtoHtml(item.content) : ''
+    const _content = item.content ? markdownToHTML(item.content): ''
 	const isAnonymous = homework_status && homework_status.indexOf('匿评中') != -1
 	const isAppealing = homework_status && homework_status.indexOf('申诉中') != -1
 	const attachments = item.attachments;