diff --git a/public/react/src/modules/developer/components/knowledge/index.js b/public/react/src/modules/developer/components/knowledge/index.js
index 36060e8e8..5d21b1420 100644
--- a/public/react/src/modules/developer/components/knowledge/index.js
+++ b/public/react/src/modules/developer/components/knowledge/index.js
@@ -4,7 +4,7 @@
  * @Github: 
  * @Date: 2019-12-30 13:51:19
  * @LastEditors  : tangjiang
- * @LastEditTime : 2019-12-30 20:08:09
+ * @LastEditTime : 2019-12-30 20:44:38
  */
 import './index.scss';
 import React, { useState, useEffect } from 'react';
@@ -32,26 +32,35 @@ function KnowLedge (props) {
 
   // 渲染下拉选项
   const renderOptions = (options = []) => {
-    console.log('下拉选择: ', options);
     return options.map((opt, i) => (
       <Option key={`opt_${i}`} value={`${opt.id}`}>{opt.name}</Option>
     ));
   }
+  // 过滤下拉列表项
   const handleSelectChange = (value) => {
-    console.log('过滤结果Start=====》》》》》', selectOptions, value);
+    value = +value.join('');
+    const tempArr = [...selectValue];
     const _result = selectOptions.filter(item => {
-      if (item === value) {
-
+      if (item.id === value && tempArr.findIndex(t => t.id === value) === -1) {
+        tempArr.push(item);
       }
-      return item !== value;
+      return item.id !== value;
     });
-    console.log('过滤结果=====》》》》》', _result, selectOptions);
+    console.log(tempArr)
+    setSelectValue(tempArr);
     setSelectOptions(_result);
   }
 
+  // 渲染下拉结果
+  const renderResult = (arrs) => {
+    return arrs.map(item => (
+      <div className="knowledge-item" key={`item_$(item.id)`}>
+        <span className="knowledge-item-txt"></span>
+      </div>
+    ));
+  }
   // 渲染下拉列表
-  const renderSelect = (options, values) => {
-    console.log('==========>>>>>>>>', options);
+  const renderSelect = (options) => {
     return (
       <Select
         value={value}
@@ -67,7 +76,11 @@ function KnowLedge (props) {
   
   return (
     <div className="knowledge-select-area">
-      { renderSelect(selectOptions, selectValue) }
+      { renderSelect(selectOptions) }
+      {/* 渲染下拉选择项 */}
+      <div className="knowledge-result">
+        { renderResult(selectValue) }
+      </div>
     </div>
   );
 }
diff --git a/public/react/src/modules/developer/newOrEditTask/leftpane/editorTab/index.js b/public/react/src/modules/developer/newOrEditTask/leftpane/editorTab/index.js
index ed142e53a..969d4df9e 100644
--- a/public/react/src/modules/developer/newOrEditTask/leftpane/editorTab/index.js
+++ b/public/react/src/modules/developer/newOrEditTask/leftpane/editorTab/index.js
@@ -4,7 +4,7 @@
  * @Github: 
  * @Date: 2019-11-20 10:35:40
  * @LastEditors  : tangjiang
- * @LastEditTime : 2019-12-30 20:09:30
+ * @LastEditTime : 2019-12-30 20:18:20
  */
 import './index.scss';
 // import 'katex/dist/katex.css';
@@ -135,6 +135,9 @@ class EditTab extends React.Component {
   handleChangeCategory = (value) => {
     // 课程下拉值变化时， 同步更新知识点
     const { courseQuestions } = this.props;
+    this.setState({
+      knowledges: []
+    });
     courseQuestions.forEach(item => {
       if (value[0] && item.id === value[0]) {
         item.sub_disciplines && item.sub_disciplines.forEach(c => {
@@ -142,16 +145,12 @@ class EditTab extends React.Component {
             this.setState({
               knowledges: [...c.tag_disciplines]
             });
-          } else {
+          } else if (!value[1]) {
             this.setState({
               knowledges: []
             });
           }
         });
-      } else {
-        this.setState({
-          knowledges: []
-        });
       }
     });
   }