diff --git a/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js b/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
index 1eb41779e..b14b30a96 100644
--- a/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
+++ b/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
@@ -1200,12 +1200,12 @@ class Coursesleftnav extends Component{
            >
              <div>    
                {this.state.Navmodalziyname==="资源"?<div className="df" style={{marginBottom:50}}> 
-             <div  className={"fl mt5"}   id="ddd">上级目录：</div>
+             <div  className={"fl mt5"} id="ddd">上级目录：</div>
             
              <TreeSelect
               className={"input-flex-35 greyInput fl"}
                style={{width:300,color:'#000000'}}
-              //  getPopupContainer={() => document.getElementById('ddd')}
+                getPopupContainer={() => document.getElementById('ddd')}
                dropdownClassName={{display:this.state.dropdownStyleshow}}
               treeData={this.state.treeData}
               placeholder={this.state.treeDataname}
diff --git a/public/react/src/modules/courses/coursesDetail/MainLeftNav.css b/public/react/src/modules/courses/coursesDetail/MainLeftNav.css
index c892aa102..955d1d3d1 100644
--- a/public/react/src/modules/courses/coursesDetail/MainLeftNav.css
+++ b/public/react/src/modules/courses/coursesDetail/MainLeftNav.css
@@ -36,6 +36,9 @@
     display:inline-block;
     max-width:200px;
 }
+.ant-select-tree{
+    max-height:300px;
+}
 /*鼠标悬浮在滚动条上的主干部分*/
 
 /*.droppableul::-webkit-scrollbar-track:hover {*/