diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index d1ab595e5..0679e5619 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -284,7 +284,7 @@ class CoursesController < ApplicationController
 
     @is_admin = @user_course_identity < Course::PROFESSOR
 
-    @applications= CourseMessage.unhandled_join_course_requests_by_course(@course)
+    @applications = @is_admin ? CourseMessage.unhandled_join_course_requests_by_course(@course) : CourseMessage.none
 
     page = params[:page] || 1
     limit = params[:limit] || 20
@@ -548,6 +548,7 @@ class CoursesController < ApplicationController
     course_teacher = CourseMember.find_by(user_id: current_user.id, role: %i[CREATOR PROFESSOR ASSISTANT_PROFESSOR], course_id: @course.id)
     course_student.destroy!
     course_teacher.update_attributes(is_active: 1) if course_teacher.present? && !course_teacher.is_active
+    CourseDeleteStudentDeleteWorksJob.perform_later(@course.id, [current_user.id])
     normal_status(0, "退出成功")
   end
 
@@ -684,11 +685,16 @@ class CoursesController < ApplicationController
     ActiveRecord::Base.transaction do
       begin
         students = params[:students]
+        student_ids = []
 
         students.each do |student|
-          course_member = CourseMember.find_by!(id: student[:course_member_id].to_i, course_id: @course.id)
-          course_member.destroy!
+          course_member = CourseMember.find_by(id: student[:course_member_id].to_i, course_id: @course.id)
+          if course_member.present?
+            student_ids << course_member.user_id
+            course_member.destroy!
+          end
         end
+        CourseDeleteStudentDeleteWorksJob.perform_later(@course.id, student_ids) if student_ids.present?
         normal_status(0, "操作成功")
       rescue => e
         uid_logger(e.message)
@@ -711,7 +717,7 @@ class CoursesController < ApplicationController
 
         student_ids = []
         user_ids.each do |user_id|
-          existing_course_member = CourseMember.find_by(user_id: user_id.to_i, course_id: @course.id)
+          existing_course_member = @course.course_members.find_by(user_id: user_id.to_i)
           new_student = CourseMember.new(user_id: user_id.to_i, course_id: @course.id, course_group_id: course_group_id, role: 4)
 
           if existing_course_member.present?
@@ -720,6 +726,7 @@ class CoursesController < ApplicationController
             else
               new_student.is_active = 0 if existing_course_member.is_active
               new_student.save!
+              student_ids << user_id
             end
           else
             new_student.save!
@@ -727,6 +734,7 @@ class CoursesController < ApplicationController
           end
         end
 
+        CourseAddStudentCreateWorksJob.perform_later(@course.id, student_ids) if student_ids.present?
         TeacherInviteJoinCourseNotifyJob.perform_later(current_user.id, @course.id, 10, student_ids) if student_ids.present?
         normal_status(0, "添加成功")
       rescue => e
@@ -868,6 +876,7 @@ class CoursesController < ApplicationController
             new_student.course_group_id = course_group.id if course_group.present?
             new_student.save!
 
+            CourseAddStudentCreateWorksJob.perform_later(course.id, [current_user.id])
             StudentJoinCourseNotifyJob.perform_later(current_user.id, course.id)
           end
         end
diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index e6f9876bc..49dd7edb9 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -477,10 +477,8 @@ class ExercisesController < ApplicationController
             params_end_time = params[:end_time].to_time
           end
 
-          if exercise_status == 2 && @exercise.publish_time != params_publish_time
-            normal_status(-1,"已发布，不允许修改发布时间")
-          elsif exercise_status == 3 && (@exercise.end_time != params_end_time || @exercise.publish_time != params_publish_time)
-            normal_status(-1,"已截止，不允许修改时间")
+          if (exercise_status != 1) && (@exercise.publish_time != params_publish_time)
+            normal_status(-1,"已发布/已截止,不允许修改发布时间")
           elsif params_publish_time.present? && params_end_time.present? && params_end_time < params_publish_time
             normal_status(-1,"截止时间不能小于发布时间")
           else
@@ -523,12 +521,7 @@ class ExercisesController < ApplicationController
             end
             # exercise_end_time = t[:end_time].present? ? t[:end_time].to_time : nil
             exercise_group = exercise_groups.find_in_exercise_group("course_group_id",course_id)  #判断该分班是否存在
-            if exercise_group.present? && exercise_group.first.end_time <= Time.now &&
-                (exercise_end_time != exercise_group.first.end_time || exercise_publish_time != exercise_group.first.publish_time)  #已截止且时间改变的，则提示错误
-              error_count += 1
-            end
-            if exercise_group.present? && exercise_group.first.publish_time <
-                Time.now && exercise_publish_time != exercise_group.first.publish_time
+            if exercise_group.present? && (exercise_group.first.publish_time < Time.now) && (exercise_publish_time != exercise_group.first.publish_time)
               error_count += 1
             end
             if error_count == 0
@@ -1639,36 +1632,9 @@ class ExercisesController < ApplicationController
     @answer_committed_user = @exercise.exercise_users.exercise_commit_users(current_user.id)&.first
     if @answer_committed_user.blank?
       normal_status(404,"答题用户不存在")
-    # elsif @exercise.get_exercise_status(current_user.id) == 2 && @answer_committed_user.commit_status == 1  #当试卷截止时，会自动提交
-    #   normal_status(-1,"提交错误,试卷用户已提交！")
     end
   end
 
-  # def commit_user_exercise
-  #   @exercise_user_current = @exercise.exercise_users.exercise_commit_users(@exercise_current_user_id)&.first  #查找当前用户是否有过答题
-  #   if @user_course_identity == Course::STUDENT
-  #     if @exercise_user_current.present?
-  #       if @exercise.time > 0 && @exercise_user_current.start_at.present?  && (@exercise_user_current.commit_status == 0) &&
-  #           ((@exercise_user_current.start_at + (@exercise.time.to_i + 1).minutes) < Time.now)
-  #         #当前用户存在，且已回答，且试卷时间已过，且未提交，则自动提交。最好是前端控制
-  #         objective_score = calculate_student_score(@exercise,current_user)[:total_score]
-  #         subjective_score = @exercise_user_current.subjective_score < 0.0 ? 0.0 : @exercise_user_current.subjective_score
-  #         total_score = objective_score + subjective_score
-  #         commit_option = {
-  #             :status => 1,
-  #             :commit_status => 1,
-  #             :end_at => Time.now,
-  #             :objective_score => objective_score,
-  #             :score => total_score,
-  #             :subjective_score => subjective_score
-  #         }
-  #         @exercise_user_current.update_attributes(commit_option)
-  #         normal_status(0,"已交卷成功！")
-  #       end
-  #     end
-  #   end
-  # end
-
   #打回重做时的初步判断
   def check_exercise_status
     @exercise_users = @exercise.all_exercise_users(current_user.id).commit_exercise_by_status(1) #当前教师所在分班的全部已提交的学生数
diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index 06326fe72..ba47c8457 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -208,9 +208,11 @@ class HomeworkCommonsController < ApplicationController
               student_work_to_xlsx(@work_excel,@homework)
               exercise_export_name = current_user.real_name + "_" + @course.name + "_" + @homework.name + "_" + Time.now.strftime('%Y%m%d_%H%M%S')
 
-              render xlsx: "#{exercise_export_name.strip.first(30)}",template: "homework_commons/works_list.xlsx.axlsx",locals:
+              render xlsx: "#{exercise_export_name.encode(Encoding.default_external,"UTF-8", :invalid => :replace, :undef => :replace, :replace => " ").strip.first(30)}",template: "homework_commons/works_list.xlsx.axlsx",locals:
                   {table_columns: @work_head_cells,task_users: @work_cells_column}
             }
+
+            # .encode(Encoding.default_external, 'gb2312')
           end
         end
       elsif params[:format] == "zip"
diff --git a/app/controllers/polls_controller.rb b/app/controllers/polls_controller.rb
index 57bbc9769..64827b375 100644
--- a/app/controllers/polls_controller.rb
+++ b/app/controllers/polls_controller.rb
@@ -1282,8 +1282,6 @@ class PollsController < ApplicationController
       else
         normal_status(-1,"请选择分班！")
       end
-    # elsif (@poll.poll_status != 1) && (params[:publish_time].to_time != @poll.publish_time) && (@user_course_identity > Course::CREATOR)
-    #   normal_status(-1,"已发布/已截止的不能修发布时间！")    #课堂管理员和超级管理员才有权限
     end
   end
 
diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index 5d14a43ea..c85474a10 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -334,7 +334,6 @@ class StudentWorksController < ApplicationController
     ActiveRecord::Base.transaction do
       begin
         # 没传score则取上次评分成绩
-        score = StudentWorksScore.where(user_id: current_user.id, student_work_id: @work.id).last
         new_score = StudentWorksScore.new
         new_score.score = params[:score].blank? ? score.try(:score) : params[:score].to_f
         new_score.comment = params[:comment] if params[:comment] && params[:comment].strip != ""
@@ -348,7 +347,9 @@ class StudentWorksController < ApplicationController
           @work.update_attributes(group_id: @homework.max_group_id) if @homework.homework_type == "group"
         end
 
-        new_score.reviewer_role = @user_course_identity == Course::STUDENT ? 3 : @user_course_identity == Course::ASSISTANT_PROFESSOR ? 2 : 1
+        reviewer_role = @user_course_identity == Course::STUDENT ? 3 : @user_course_identity == Course::ASSISTANT_PROFESSOR ? 2 : 1
+        new_score.reviewer_role = reviewer_role
+        score = StudentWorksScore.where(user_id: current_user.id, student_work_id: @work.id, reviewer_role: reviewer_role).last
 
         if new_score.save!
           Attachment.associate_container(params[:attachment_ids], new_score.id, new_score.class)
@@ -730,19 +731,19 @@ class StudentWorksController < ApplicationController
     student_works.each do |st_work|
       st_score = StudentWorksScore.new(user_id: new_score.user_id, score: new_score.score,
                                        reviewer_role: new_score.reviewer_role, comment: new_score.comment)
-      st_work.student_works_scores << st_score
 
-      score = StudentWorksScore.where(user_id: new_score.user_id, student_work_id: st_work.id).last
+      score = StudentWorksScore.where(user_id: new_score.user_id, student_work_id: st_work.id, reviewer_role: new_score.reviewer_role).last
       # 该用户的历史评阅无效
       score.update_column('is_invalid', true) if score.present? && score.score.present?
+      st_work.student_works_scores << st_score
 
       if new_score.reviewer_role == 1
-        st_work.teacher_score = new_score.score
+        st_work.teacher_score = new_score.score if new_score.score.present?
       elsif new_score.reviewer_role == 2
         if homework.homework_detail_manual.ta_mode == 1
           st_work.teaching_asistant_score = new_score.ta_score st_work.id
         else
-          st_work.teaching_asistant_score = new_score.score
+          st_work.teaching_asistant_score = new_score.score if new_score.score.present?
         end
       else
         st_work.student_score = student_work.student_score
diff --git a/app/controllers/zips_controller.rb b/app/controllers/zips_controller.rb
index 4089e5231..2b70b9b27 100644
--- a/app/controllers/zips_controller.rb
+++ b/app/controllers/zips_controller.rb
@@ -10,6 +10,7 @@ class ZipsController < ApplicationController
     service = BatchExportShixunReportService.new(@homework, @all_student_works)
 
     filename = filename_for_content_disposition(service.filename)
+
     send_file service.zip, filename: filename, type: 'application/zip'
   rescue BatchExportShixunReportService::Error => ex
     normal_status(-1, ex.message)
diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index a23cb8a65..7f64a99cd 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -40,10 +40,17 @@ module ExportHelper
       works.includes(user: :user_extension, student_works_scores: :user).each_with_index do |w, index|
         w_user = w.user
         w_1 = (index + 1)
-        w_2 = w_user.login
-        w_3 = w_user.real_name
-        w_3_1 = w_user.mail
-        w_4 = w_user.student_id.present? ? w_user.student_id : "--"
+        if w_user.present?
+          w_2 = w_user&.login
+          w_3 = w_user&.real_name
+          w_3_1 = w_user&.mail
+          w_4 = w_user.student_id.present? ? w_user.student_id : "--"
+        else
+          w_2 = "--"
+          w_3 = "--"
+          w_3_1 = "--"
+          w_4 = "--"
+        end
         course_name = course.students.find_by(user_id: w.user_id).try(:course_group_name)
         w_5 = course_name.present? ? course_name : "--"
         #0： 未提交， 1 按时提交， 2 延迟提交
@@ -487,6 +494,8 @@ module ExportHelper
 
     zipfile_name = "#{output_path}/#{rename_zipfile}"
 
+    # 同名文件重命名时用
+    index = 1
     Dir.mkdir(File.dirname(zipfile_name)) unless File.exist?(File.dirname(zipfile_name))
     Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
       files_paths.each do |filename|
@@ -496,7 +505,11 @@ module ExportHelper
         begin
           zipfile.add(rename_file, filename)
         rescue Exception => e
-          zipfile.get_output_stream('FILE_NOTICE.txt'){|os| os.write "该作品中有重复命名文件，请通过文件名学号和姓名信息进入该作业详细界面手动下载"}
+          rename_file = rename_same_file(rename_file, index)
+          index += 1
+          zipfile.add(rename_file, filename)
+
+          # zipfile.get_output_stream('FILE_NOTICE.txt'){|os| os.write "该作品中有重复命名文件，请通过文件名学号和姓名信息进入该作业详细界面手动下载"}
           next
         end
       end
@@ -516,4 +529,11 @@ module ExportHelper
   def format_sheet_name name
     name = name.gsub(":", "-")
   end
+
+  def rename_same_file(name, index)
+    basename = File.basename(name, ".*")
+    new_basename = basename + "_" + index.to_s
+    extname = File.extname(name)
+    new_basename + extname
+  end
 end
diff --git a/app/jobs/course_add_student_create_works_job.rb b/app/jobs/course_add_student_create_works_job.rb
new file mode 100644
index 000000000..1631b5b77
--- /dev/null
+++ b/app/jobs/course_add_student_create_works_job.rb
@@ -0,0 +1,67 @@
+# 学生加入课堂时创建相关任务作品
+class CourseAddStudentCreateWorksJob < ApplicationJob
+  queue_as :course_member
+
+  def perform(course_id, student_ids)
+    course = Course.find_by(id: course_id)
+    return if course.blank?
+
+    # 如果之前存在相关作品，则更新is_delete字段
+    student_works = StudentWork.joins(:homework_common).where(user_id: student_ids, homework_commons: {course_id: course.id})
+    student_works.update_all(is_delete: 0)
+
+    exercise_users = ExerciseUser.joins(:exercise).where(user_id: student_ids, exercises: {course_id: course.id})
+    exercise_users.update_all(is_delete: 0)
+
+    poll_users = PollUser.joins(:poll).where(user_id: student_ids, polls: {course_id: course.id})
+    poll_users.update_all(is_delete: 0)
+
+    graduation_works = course.graduation_works.where(user_id: student_ids)
+    graduation_works.update_all(is_delete: 0)
+
+    attrs = %i[homework_common_id user_id created_at updated_at]
+
+    StudentWork.bulk_insert(*attrs) do |worker|
+      student_ids.each do |user_id|
+        same_attrs = {user_id: user_id}
+        course.homework_commons.where(homework_type: %i[normal group practice]).each do |homework|
+          next if homework.student_works.where(user_id: user_id).any?
+          worker.add same_attrs.merge(homework_common_id: homework.id)
+        end
+      end
+    end
+
+    attrs = %i[exercise_id user_id created_at updated_at]
+    ExerciseUser.bulk_insert(*attrs) do |worker|
+      student_ids.each do |user_id|
+        same_attrs = {user_id: user_id}
+        course.exercises.each do |exercise|
+          next if exercise.exercise_users.where(user_id: user_id).any?
+          worker.add same_attrs.merge(exercise_id: exercise.id)
+        end
+      end
+    end
+
+    attrs = %i[poll_id user_id created_at updated_at]
+    PollUser.bulk_insert(*attrs) do |worker|
+      student_ids.each do |user_id|
+        same_attrs = {user_id: user_id}
+        course.polls.each do |poll|
+          next if poll.poll_users.where(user_id: user_id).any?
+          worker.add same_attrs.merge(poll_id: poll.id)
+        end
+      end
+    end
+
+    attrs = %i[graduation_task_id user_id course_id created_at updated_at]
+    GraduationWork.bulk_insert(*attrs) do |worker|
+      student_ids.each do |user_id|
+        same_attrs = {user_id: user_id, course_id: course.id}
+        course.graduation_tasks.each do |task|
+          next if task.graduation_works.where(user_id: user_id).any?
+          worker.add same_attrs.merge(graduation_task_id: task.id)
+        end
+      end
+    end
+  end
+end
diff --git a/app/jobs/course_delete_student_delete_works_job.rb b/app/jobs/course_delete_student_delete_works_job.rb
new file mode 100644
index 000000000..c12762fbe
--- /dev/null
+++ b/app/jobs/course_delete_student_delete_works_job.rb
@@ -0,0 +1,19 @@
+class CourseDeleteStudentDeleteWorksJob < ApplicationJob
+  queue_as :course_member
+
+  def perform(course_id, student_ids)
+    course = Course.find_by(id: course_id)
+    return if course.blank?
+
+    student_works = StudentWork.joins(:homework_common).where(user_id: student_ids, homework_commons: {course_id: course.id})
+    student_works.update_all(is_delete: 1)
+
+    exercise_users = ExerciseUser.joins(:exercise).where(user_id: student_ids, exercises: {course_id: course.id})
+    exercise_users.update_all(is_delete: 1)
+
+    poll_users = PollUser.joins(:poll).where(user_id: student_ids, polls: {course_id: course.id})
+    poll_users.update_all(is_delete: 1)
+
+    course.graduation_works.where(user_id: student_ids).update_all(is_delete: 1)
+  end
+end
diff --git a/app/jobs/homework_absence_penalty_calculation_job.rb b/app/jobs/homework_absence_penalty_calculation_job.rb
index 87f78f311..6e80f2330 100644
--- a/app/jobs/homework_absence_penalty_calculation_job.rb
+++ b/app/jobs/homework_absence_penalty_calculation_job.rb
@@ -11,7 +11,7 @@ class HomeworkAbsencePenaltyCalculationJob < ApplicationJob
 
     homework_common.student_works.where("work_status != 0").each do |student_work|
       absence_penalty_count = student_work.user.student_works_evaluation_distributions.where(student_work_id: work_ids).count -
-          student_work.user.student_works_scores.where(student_work_id: work_ids, reviewer_role: 3).group_by(:student_work_id).count
+          student_work.user.student_works_scores.where(student_work_id: work_ids, reviewer_role: 3).group_by(&:student_work_id).count
 
       student_work.absence_penalty = absence_penalty_count > 0 ? absence_penalty_count * homework_detail_manual.absence_penalty : 0
       student_work.save
diff --git a/app/models/course_member.rb b/app/models/course_member.rb
index 7db681e67..52c13dbbf 100644
--- a/app/models/course_member.rb
+++ b/app/models/course_member.rb
@@ -20,8 +20,8 @@ class CourseMember < ApplicationRecord
   # 未分班
   scope :ungroup_students, -> { where(course_group_id: 0, role: 4) }
 
-  after_destroy :delete_works
-  after_create :work_operation
+  # after_destroy :delete_works
+  # after_create :work_operation
   def delete_works
     if self.role == "STUDENT"
       course = self.course
@@ -52,13 +52,13 @@ class CourseMember < ApplicationRecord
   def recover_works
     course = self.course
 
-    student_works = StudentWork.where(user_id: self.user_id, homework_common_id: course.homework_commons)
+    student_works = StudentWork.joins(:homework_common).where(user_id: self.user_id, homework_commons: {course_id: course.id})
     student_works.update_all(is_delete: 0)
 
-    exercise_users = ExerciseUser.where(user_id: self.user_id, exercise_id: course.exercises)
+    exercise_users = ExerciseUser.joins(:exercise).where(user_id: self.user_id, exercises: {course_id: course.id})
     exercise_users.update_all(is_delete: 0)
 
-    poll_users = PollUser.where(user_id: self.user_id, poll_id: course.polls)
+    poll_users = PollUser.joins(:poll).where(user_id: self.user_id, polls: {course_id: course.id})
     poll_users.update_all(is_delete: 0)
 
     graduation_works = course.graduation_works.where(user_id: self.user_id)
diff --git a/app/services/batch_export_shixun_report_service.rb b/app/services/batch_export_shixun_report_service.rb
index 90c8fb2af..2c294395d 100644
--- a/app/services/batch_export_shixun_report_service.rb
+++ b/app/services/batch_export_shixun_report_service.rb
@@ -36,7 +36,7 @@ class BatchExportShixunReportService
         rescue => ex
           Rails.logger.error(ex.message)
 
-          zip.get_output_stream('FILE_NOTICE.txt'){|os| os.write('文件重复') }
+          zip.get_output_stream('FILE_NOTICE.txt'){|os| os.write("文件重复:#{export.filename}") }
           next
         end
       end
diff --git a/config/sidekiq.yml b/config/sidekiq.yml
index 5bd9dad23..93e89b4dc 100644
--- a/config/sidekiq.yml
+++ b/config/sidekiq.yml
@@ -5,4 +5,5 @@
   - [default, 3]
   - [score, 4]
   - [evaluation_comment, 5]
+  - [course_member, 6]
   - [notify, 100]
\ No newline at end of file
diff --git a/lib/tasks/homework_evaluation.rake b/lib/tasks/homework_evaluation.rake
index 56c46179c..757b07877 100644
--- a/lib/tasks/homework_evaluation.rake
+++ b/lib/tasks/homework_evaluation.rake
@@ -60,9 +60,9 @@ namespace :homework_evaluation do
           HomeworkAnonymousAppealStartNotifyJob.perform_later(homework_common.id)
         else
           homework_detail_manual.update_column('comment_status', 5)
+          # 没有申诉阶段则直接计算缺评扣分 否则申诉结束时才计算
+          HomeworkAbsencePenaltyCalculationJob.perform_later(homework_common.id)
         end
-
-        HomeworkAbsencePenaltyCalculationJob.perform_later(homework_common.id)
       end
     end
   end
@@ -71,5 +71,8 @@ namespace :homework_evaluation do
   task :end_appeal => :environment do
     homework_detail_manuals = HomeworkDetailManual.where("appeal_time <= '#{Time.now}' and homework_detail_manuals.comment_status = 4")
     homework_detail_manuals.update_all(:comment_status => 5)
+    homework_detail_manuals.each do |homework_detail_manual|
+      HomeworkAbsencePenaltyCalculationJob.perform_later(homework_detail_manual.homework_common_id)
+    end
   end
 end
diff --git a/spec/jobs/course_add_student_create_works_job_spec.rb b/spec/jobs/course_add_student_create_works_job_spec.rb
new file mode 100644
index 000000000..5466f830c
--- /dev/null
+++ b/spec/jobs/course_add_student_create_works_job_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe CourseAddStudentCreateWorksJob, type: :job do
+  pending "add some examples to (or delete) #{__FILE__}"
+end
diff --git a/spec/jobs/course_delete_student_delete_works_job_spec.rb b/spec/jobs/course_delete_student_delete_works_job_spec.rb
new file mode 100644
index 000000000..71ad3b1dc
--- /dev/null
+++ b/spec/jobs/course_delete_student_delete_works_job_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe CourseDeleteStudentDeleteWorksJob, type: :job do
+  pending "add some examples to (or delete) #{__FILE__}"
+end