diff --git a/app/controllers/admins/shixun_settings_controller.rb b/app/controllers/admins/shixun_settings_controller.rb
index 547e31fd9..1fcac9362 100644
--- a/app/controllers/admins/shixun_settings_controller.rb
+++ b/app/controllers/admins/shixun_settings_controller.rb
@@ -83,9 +83,9 @@ class Admins::ShixunSettingsController < Admins::BaseController
       sheet1[count_row, 6] = shixun.myshixuns_count
       sheet1[count_row, 7] = shixun.myshixuns.select{|m| m.status == 1}.size
       sheet1[count_row, 8] = shixun.shixun_status
-      sheet1[count_row, 9] = shixun.user.show_real_name
-      sheet1[count_row, 10] = shixun.user.school_name
-      sheet1[count_row, 11] = shixun.user.identity
+      sheet1[count_row, 9] = shixun.user&.show_real_name
+      sheet1[count_row, 10] = shixun.user&.school_name
+      sheet1[count_row, 11] = shixun.user&.identity
       shixun.challenges.each do |challenge|
         sheet1[count_row, 12] = "第#{challenge.position}关"
         sheet1[count_row, 13] = challenge.subject
diff --git a/public/react/src/common/components/comment/index.scss b/public/react/src/common/components/comment/index.scss
index 067fc7e9a..41371e8cc 100644
--- a/public/react/src/common/components/comment/index.scss
+++ b/public/react/src/common/components/comment/index.scss
@@ -180,7 +180,7 @@ $ml: 20px;
     background: #fff;
     left: 0px;
     right: 0px;
-    top: -220px;
+    top: -250px;
     padding: 0 20px;
   }
 }
\ No newline at end of file
diff --git a/public/react/src/modules/developer/studentStudy/leftpane/index.js b/public/react/src/modules/developer/studentStudy/leftpane/index.js
index d9527a13e..30eedea18 100644
--- a/public/react/src/modules/developer/studentStudy/leftpane/index.js
+++ b/public/react/src/modules/developer/studentStudy/leftpane/index.js
@@ -4,7 +4,7 @@
  * @Github: 
  * @Date: 2019-11-23 11:33:41
  * @LastEditors  : tangjiang
- * @LastEditTime : 2019-12-25 11:07:42
+ * @LastEditTime : 2019-12-25 17:10:30
 //  */
 import './index.scss';
 import React, { useState, useEffect, useMemo } from 'react';
@@ -129,7 +129,7 @@ const LeftPane = (props) => {
           />
         </div>
         <div className="number_flex flex_info">
-          <TextNumber text="huifu1" number={comments_count} type="icon" onIconClick={handleClickMessage}/>
+          <TextNumber text="huifu1" number={hack.comments_count} type="icon" onIconClick={handleClickMessage}/>
           <TextNumber 
             className={user_praise ? 'like active' : 'like'}
             text="dianzan" 
diff --git a/public/react/src/redux/actions/actionTypes.js b/public/react/src/redux/actions/actionTypes.js
index 0420a0af4..2c83176b4 100644
--- a/public/react/src/redux/actions/actionTypes.js
+++ b/public/react/src/redux/actions/actionTypes.js
@@ -56,6 +56,7 @@ const types = {
   CLEAR_OJ_FOR_USER_REDUCER: 'CLEAR_OJ_FOR_USER_REDUCER', // 退出时清空 ojForUserReducer保存内容
   ADD_OJ_LIKE_COUNT: 'ADD_OJ_LIKE_COUNT', // 增加点赞数
   CHANGE_RECORD_PAGINATION_PAGE: 'CHANGE_RECORD_PAGINATION_PAGE', // 改变提交分页
+  UPDATE_OJ_FOR_USER_COMMENT_COUNT: 'UPDATE_OJ_FOR_USER_COMMENT_COUNT', // 更新 hack 中的评论数
   /*** jupyter  */
   GET_JUPYTER_DATA_SETS: 'GET_JUPYTER_DATA_SETS', // jupyter 数据集
   GET_JUPYTER_TPI_URL: 'GET_JUPYTER_TPI_URL', // 获取 jupyter url
diff --git a/public/react/src/redux/actions/comment.js b/public/react/src/redux/actions/comment.js
index a247daf56..f12001f99 100644
--- a/public/react/src/redux/actions/comment.js
+++ b/public/react/src/redux/actions/comment.js
@@ -4,7 +4,7 @@
  * @Github: 
  * @Date: 2019-12-23 10:53:25
  * @LastEditors  : tangjiang
- * @LastEditTime : 2019-12-25 10:55:27
+ * @LastEditTime : 2019-12-25 17:06:57
  */
 import types from "./actionTypes";
 
@@ -24,6 +24,11 @@ export const addComment = (identifier, comments) => {
       if (res.status === 200) {
         // 重新加载评论列表
         dispatch(getCommentLists(identifier));
+        // 成功后，评论加一条
+        dispatch({
+          type: types.UPDATE_OJ_FOR_USER_COMMENT_COUNT,
+          payload: 'add' //
+        });
       }
     });
   }
@@ -57,6 +62,11 @@ export const replayChildComment = (identifier, comment) => {
       if (res.status === 200) {
         // 重新加载评论列表
         dispatch(getCommentLists(identifier));
+        // 成功后，评论加一条
+        dispatch({
+          type: types.UPDATE_OJ_FOR_USER_COMMENT_COUNT,
+          payload: 'add' //
+        });
       }
     });
   }
@@ -69,6 +79,11 @@ export const deleteComment = (identifier, delId) => {
       if (res.status === 200) {
         // 重新加载评论列表
         dispatch(getCommentLists(identifier));
+        // 成功后，评论加一条
+        dispatch({
+          type: types.UPDATE_OJ_FOR_USER_COMMENT_COUNT,
+          payload: 'minus' //
+        });
       }
     });
   }
diff --git a/public/react/src/redux/reducers/ojForUserReducer.js b/public/react/src/redux/reducers/ojForUserReducer.js
index 8d82b8307..18ffd30c8 100644
--- a/public/react/src/redux/reducers/ojForUserReducer.js
+++ b/public/react/src/redux/reducers/ojForUserReducer.js
@@ -4,7 +4,7 @@
  * @Github: 
  * @Date: 2019-11-27 13:41:48
  * @LastEditors  : tangjiang
- * @LastEditTime : 2019-12-25 14:45:47
+ * @LastEditTime : 2019-12-25 17:09:53
  */
 import types from "../actions/actionTypes";
 import { Base64 } from 'js-base64';
@@ -211,6 +211,13 @@ const ojForUserReducer = (state = initialState, action) => {
         ...state,
         pages: Object.assign({}, state.pages, { page: action.payload})
       }
+    case types.UPDATE_OJ_FOR_USER_COMMENT_COUNT:
+      const {comments_count} = state.hack;
+      const _comments_count = action.payload === 'add' ? comments_count + 1 : comments_count - 1;
+      return {
+        ...state,
+        hack: Object.assign({}, state.hack, { comments_count: _comments_count })
+      }
     default:
       return state;
   }