diff --git a/public/react/src/modules/courses/Resource/Fileslistitem.js b/public/react/src/modules/courses/Resource/Fileslistitem.js
index 7af1f6f2e..563724040 100644
--- a/public/react/src/modules/courses/Resource/Fileslistitem.js
+++ b/public/react/src/modules/courses/Resource/Fileslistitem.js
@@ -38,19 +38,19 @@ class Fileslistitem extends Component{
         }).then((result)=>{
 
 						if(result.data.attachment_histories.length===0){
-							// if(result.data.is_pdf===true){
-							// 	//预览pdf
-							// 	axios({
-							// 		method:'get',
-							// 	  url:result.data.url,
-							// 		responseType: 'arraybuffer',
-							// 	}).then((result)=>{
-							// 			var binaryData = [];
-							// 			binaryData.push(result.data);
-							// 			 this.url =window.URL.createObjectURL(new Blob(binaryData, {type:"application/pdf"}));
-							// 			window.open(this.url);
-							// 		})
-							// }else{	}
+							if(result.data.is_pdf===true){
+								//预览pdf
+								axios({
+									method:'get',
+								  url:result.data.url,
+									responseType: 'arraybuffer',
+								}).then((result)=>{
+										var binaryData = [];
+										binaryData.push(result.data);
+										 this.url =window.URL.createObjectURL(new Blob(binaryData, {type:"application/pdf"}));
+										window.open(this.url);
+									})
+							}else{
 							let link = document.createElement('a');
 							document.body.appendChild(link);
 							link.href = "/api"+result.data.url;
@@ -60,6 +60,7 @@ class Fileslistitem extends Component{
 							evt.initEvent("click", false, false);
 							link.dispatchEvent(evt);
 							document.body.removeChild(link);
+							}
 						}else{
 							this.setState({
 								Showoldfiles:true,
diff --git a/public/react/src/modules/courses/coursesPublic/Showoldfiles.js b/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
index bdac70abc..483768271 100644
--- a/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
+++ b/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
@@ -187,11 +187,10 @@ class Showoldfiles extends Component{
 												<div className="clearfix edu-txt-center lineh-40 bor-bottom-greyE" id={allfiles.id}>
 
 													<li className="fl fontlefts">
-														{/*{allfiles.is_pdf===false?*/}
-														{/*<a className={"isabox"} href={"/api"+allfiles.url} >{allfiles.title}</a>:*/}
-															{/*<a className={"isabox"} onClick={()=>this.showfiless(allfiles.url)} >{allfiles.title}</a>*/}
-														{/*}*/}
-														<a className={"isabox"} href={"/api"+allfiles.url} >{allfiles.title}</a>
+														{allfiles.is_pdf===false?
+														<a className={"isabox"} href={"/api"+allfiles.url} >{allfiles.title}</a>:
+															<a className={"isabox"} onClick={()=>this.showfiless(allfiles.url)} >{allfiles.title}</a>
+														}
 														<span className={"newcolor-orange fl"}>当前版本</span>
 													</li>
 
@@ -207,11 +206,11 @@ class Showoldfiles extends Component{
 																<div className="clearfix edu-txt-center lineh-40 bor-bottom-greyE" id={item.id} key={key}>
 
 																	<li className="fl fontlefts">
-																		<a  className={"isabox"} href={"/api"+item.url}>{item.title}</a>
-																		{/*{item.is_pdf===false?*/}
-																			{/*<a  className={"isabox"} href={"/api"+item.url}>{item.title}</a>:*/}
-																			{/*<a className={"isabox"} onClick={()=>this.showfiless(item.url)} >{item.title}</a>*/}
-																		{/*}*/}
+
+																		{item.is_pdf===false?
+																			<a  className={"isabox"} href={"/api"+item.url}>{item.title}</a>:
+																			<a className={"isabox"} onClick={()=>this.showfiless(item.url)} >{item.title}</a>
+																		}
 																	</li>
 
 																	<li className="fl filesves ">