diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index cb2b8d201..fa1d06d77 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -994,8 +994,7 @@ class CoursesController < ApplicationController
         else
           member_to_xlsx(@course, @all_members, @c_homeworks, @c_exercises, @c_tasks)
           filename_ = "#{current_user.real_name}_#{@course.name}_全部成绩"
-          filename = Base64.urlsafe_encode64(filename_)
-          render xlsx: "#{format_sheet_name filename.strip.first(30)}",template: "courses/export_member_scores_excel.xlsx.axlsx",
+          render xlsx: "#{format_sheet_name filename_.strip.first(30)}",template: "courses/export_member_scores_excel.xlsx.axlsx",
                  locals: {course_info:@course_info, activity_level:@user_activity_level,
                           course_scores:@course_user_scores,shixun_works:@shixun_work_arrays,
                           common_works:@common_work_arrays,group_works:@group_work_arrays,task_works:@task_work_arrays,
diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index cc7756ca2..1a20e7406 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1291,24 +1291,15 @@ class ExercisesController < ApplicationController
           elsif (@exercise_users_size == 0) || ( @export_ex_users&.exercise_user_committed.size == 0)
             normal_status(-1,"暂无用户提交")
           else
-            get_export_users(@exercise,@course,@export_ex_users)
-            exercise_export_name = "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}"
-            ex_xlsx = render_to_string handlers: [:axlsx], formats: [:xlsx], template: "exercises/exercise_lists.xlsx.axlsx", locals: {table_columns:@table_columns,exercise_users:@user_columns}
-            zip_file = Tempfile.new(exercise_export_name,"/home/tmp")
-            zip_file.write(ex_xlsx)
-            zip_file.close
-            # render json{:status => 0,"file_name":"#{exercise_export_name}"}
-            render :json => { status: 0, file_name: "#{exercise_export_name}",file_path: "#{zip_file.path}" }
-            # respond_to do |format|
-            #   format.xlsx{
-            #     get_export_users(@exercise,@course,@export_ex_users)
-            #     exercise_export_name_ =
-            #         "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}"
-            #     exercise_export_name = Base64.urlsafe_encode64(exercise_export_name_.strip.first(30))
-            #
-            #     render xlsx: "#{exercise_export_name}",template: "exercises/exercise_lists.xlsx.axlsx",locals: {table_columns:@table_columns,exercise_users:@user_columns}
-            #   }
-            # end
+            respond_to do |format|
+              format.xlsx{
+                get_export_users(@exercise,@course,@export_ex_users)
+                exercise_export_name_ =
+                    "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+
+                render xlsx: "#{exercise_export_name_.strip.first(30)}",template: "exercises/exercise_lists.xlsx.axlsx",locals: {table_columns:@table_columns,exercise_users:@user_columns}
+              }
+            end
           end
         end
       rescue Exception => e
@@ -1323,10 +1314,9 @@ class ExercisesController < ApplicationController
   def export_exercise
     @request_url = request.base_url
     @exercise_questions = @exercise.exercise_questions.includes(:exercise_choices).order("question_number ASC")
-    filename_ = "#{@exercise.user.real_name}_#{@exercise.exercise_name}"
-    filename = Base64.urlsafe_encode64(filename_.strip.first(30))
+    filename_ = "#{@exercise.user.real_name}_#{@exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
     stylesheets = "#{Rails.root}/app/templates/exercise_export/exercise_export.css"
-    render pdf: 'exercise_export/blank_exercise', filename: filename, stylesheets: stylesheets
+    render pdf: 'exercise_export/blank_exercise', filename: filename_.strip.first(30), stylesheets: stylesheets
   end
 
   #空白试卷预览页面,仅供测试使用，无其他任何用途
diff --git a/app/controllers/graduation_tasks_controller.rb b/app/controllers/graduation_tasks_controller.rb
index 41d8bd68d..c3b73ad20 100644
--- a/app/controllers/graduation_tasks_controller.rb
+++ b/app/controllers/graduation_tasks_controller.rb
@@ -134,9 +134,8 @@ class GraduationTasksController < ApplicationController
           respond_to do |format|
             format.xlsx{
               graduation_work_to_xlsx(@work_excel,@task,current_user)
-              task_export_name_ = "#{current_user.real_name}_#{@course.name}_#{@task.name}"
-              task_export_name = Base64.urlsafe_encode64(task_export_name_.strip.first(30))
-              render xlsx: "#{task_export_name}",template: "graduation_tasks/tasks_list.xlsx.axlsx",locals: {table_columns:@head_cells_column, task_users:@task_cells_column}
+              task_export_name_ = "#{current_user.real_name}_#{@course.name}_#{@task.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+              render xlsx: "#{task_export_name_.strip.first(30)}",template: "graduation_tasks/tasks_list.xlsx.axlsx",locals: {table_columns:@head_cells_column, task_users:@task_cells_column}
             }
           end
         end
diff --git a/app/controllers/graduation_topics_controller.rb b/app/controllers/graduation_topics_controller.rb
index 75f7ddc6f..4ad07c77e 100644
--- a/app/controllers/graduation_topics_controller.rb
+++ b/app/controllers/graduation_topics_controller.rb
@@ -271,8 +271,7 @@ class GraduationTopicsController < ApplicationController
       students = course.students.joins(user: :user_extension).order("user_extensions.student_id")
       graduation_topic_to_xlsx(students,course)
       topic_export_name_ = "#{current_user.real_name}_#{course.name}_毕设选题_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
-      topic_export_name = Base64.urlsafe_encode64(topic_export_name_.strip.first(30))
-      render xlsx: "#{topic_export_name}",template: "graduation_topics/export.xlsx.axlsx",locals: {table_columns:@topic_head_cells,topic_users:@topic_body_cells}
+      render xlsx: "#{topic_export_name_.strip.first(30)}",template: "graduation_topics/export.xlsx.axlsx",locals: {table_columns:@topic_head_cells,topic_users:@topic_body_cells}
     rescue Exception => e
       uid_logger(e.message)
       missing_template
diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index cdbfac5bc..9a12634cf 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -206,9 +206,8 @@ class HomeworkCommonsController < ApplicationController
           respond_to do |format|
             format.xlsx{
               student_work_to_xlsx(@work_excel,@homework)
-              exercise_export_name = "#{current_user.real_name}_#{@course.name}_#{@homework.name}"
-              file_name = Base64.urlsafe_encode64(exercise_export_name.strip.first(30))
-              render xlsx: "#{file_name}",template: "homework_commons/works_list.xlsx.axlsx",locals:
+              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:
                   {table_columns: @work_head_cells,task_users: @work_cells_column}
             }
           end
diff --git a/app/controllers/polls_controller.rb b/app/controllers/polls_controller.rb
index fa8d7dd8c..47ad365f5 100644
--- a/app/controllers/polls_controller.rb
+++ b/app/controllers/polls_controller.rb
@@ -936,11 +936,9 @@ class PollsController < ApplicationController
           else
             respond_to do |format|
               format.xlsx{
-                polls_export_name_ = "#{current_user.real_name}_#{@course.name}_#{@poll.polls_name}"
-                polls_export_name = Base64.urlsafe_encode64(polls_export_name_.strip.first(30))
-
+                polls_export_name_ = "#{current_user.real_name}_#{@course.name}_#{@poll.polls_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
                 polls_user_commit = poll_commit_result(@poll,@poll_export_questions,@poll_users,@poll_commit_ids)
-                render xlsx: "#{polls_export_name}",template: "polls/commit_result.xlsx.axlsx",locals: {polls_user_commit:polls_user_commit}
+                render xlsx: "#{polls_export_name_.strip.first(30)}",template: "polls/commit_result.xlsx.axlsx",locals: {polls_user_commit:polls_user_commit}
               }
             end
           end
diff --git a/app/controllers/zips_controller.rb b/app/controllers/zips_controller.rb
index e8a2874dd..a4140fe34 100644
--- a/app/controllers/zips_controller.rb
+++ b/app/controllers/zips_controller.rb
@@ -6,12 +6,9 @@ class ZipsController < ApplicationController
   before_action :require_admin_or_teacher
 
   def shixun_report
-
     service = BatchExportShixunReportService.new(@homework, @all_student_works)
-
     filename_ = filename_for_content_disposition(service.filename)
-    filename = Base64.urlsafe_encode64(filename_)
-    send_file service.zip, filename: filename, type: 'application/zip'
+    send_file service.zip, filename: filename_, type: 'application/zip'
   rescue BatchExportShixunReportService::Error => ex
     normal_status(-1, ex.message)
   end
@@ -21,8 +18,7 @@ class ZipsController < ApplicationController
     exercises = ExportExercisesService.new(@exercise,@ex_users,@request_url)
 
     file_name_ = filename_for_content_disposition(exercises.filename)
-    file_name = Base64.urlsafe_encode64(file_name_)
-    send_file exercises.ex_zip, filename: file_name, type: 'application/zip'
+    send_file exercises.ex_zip, filename: file_name_, type: 'application/zip'
   rescue Exception => e
     normal_status(-1, e.message)
   end
diff --git a/app/services/batch_export_shixun_report_service.rb b/app/services/batch_export_shixun_report_service.rb
index 01d94ffe5..d71235790 100644
--- a/app/services/batch_export_shixun_report_service.rb
+++ b/app/services/batch_export_shixun_report_service.rb
@@ -14,7 +14,7 @@ class BatchExportShixunReportService
   end
 
   def filename
-    @_filename ||= "#{homework.name}"
+    @_filename ||= "#{homework.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
   end
 
   def zip
diff --git a/app/services/export_exercises_service.rb b/app/services/export_exercises_service.rb
index 1b284e598..ca2d347a6 100644
--- a/app/services/export_exercises_service.rb
+++ b/app/services/export_exercises_service.rb
@@ -10,7 +10,7 @@ class ExportExercisesService
   end
 
   def filename
-    exercise_export_name = "#{exercise.user.real_name}_#{exercise.exercise_name}"
+    exercise_export_name = "#{exercise.user.real_name}_#{exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
     "#{exercise_export_name.strip}.zip"
   end