diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index bdb367111..9ae909dbc 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -1029,8 +1029,8 @@ class CoursesController < ApplicationController
           normal_status(-1,"课堂暂时没有学生")
         else
           member_to_xlsx(@course, @all_members, @c_homeworks, @c_exercises, @c_tasks)
-          filename_ = "#{current_user.real_name}_#{@course.name}_全部成绩"
-          render xlsx: "#{format_sheet_name filename_.strip.first(30)}",template: "courses/export_member_scores_excel.xlsx.axlsx",
+          filename_ = "#{current_user.real_name}_#{@course.name}_全部成绩_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+          render xlsx: "#{format_sheet_name filename_.strip}",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 03c943f8d..7c8c07d01 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1262,7 +1262,7 @@ class ExercisesController < ApplicationController
                 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}
+                render xlsx: "#{exercise_export_name_.strip}",template: "exercises/exercise_lists.xlsx.axlsx",locals: {table_columns:@table_columns,exercise_users:@user_columns}
               }
             end
           end
diff --git a/app/controllers/graduation_tasks_controller.rb b/app/controllers/graduation_tasks_controller.rb
index ab99e8d86..aeb5c409d 100644
--- a/app/controllers/graduation_tasks_controller.rb
+++ b/app/controllers/graduation_tasks_controller.rb
@@ -137,7 +137,7 @@ class GraduationTasksController < ApplicationController
             format.xlsx{
               graduation_work_to_xlsx(@work_excel,@task,current_user)
               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}
+              render xlsx: "#{task_export_name_.strip}",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 754b472c5..96816c2a6 100644
--- a/app/controllers/graduation_topics_controller.rb
+++ b/app/controllers/graduation_topics_controller.rb
@@ -271,7 +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')}"
-      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}
+      render xlsx: "#{topic_export_name_.strip}",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/polls_controller.rb b/app/controllers/polls_controller.rb
index 4348b3bfc..87435f743 100644
--- a/app/controllers/polls_controller.rb
+++ b/app/controllers/polls_controller.rb
@@ -950,7 +950,7 @@ class PollsController < ApplicationController
               format.xlsx{
                 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_.strip.first(30)}",template: "polls/commit_result.xlsx.axlsx",locals: {polls_user_commit:polls_user_commit}
+                render xlsx: "#{polls_export_name_.strip}",template: "polls/commit_result.xlsx.axlsx",locals: {polls_user_commit:polls_user_commit}
               }
             end
           end
diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index f9f4717a6..a5d46e46a 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -457,8 +457,8 @@ class StudentWorksController < ApplicationController
     @myself_eff = @echart_data[:efficiency_list].find { |item| item.last == @user.id }
     @myself_consume = @echart_data[:consume_list].find { |item| item.last == @user.id }
 
-    filename_ = "实训报告_#{@shixun&.name}_#{@use&.real_name}"
-    filename = Base64.urlsafe_encode64(filename_.strip.first(30))
+    filename_ = "#{@use&.student_id}_#{@use&.real_name}_#{@shixun&.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+    filename = Base64.urlsafe_encode64(filename_.strip)
     stylesheets = %w(shixun_work/shixun_work.css shared/codemirror.css)
     render pdf: 'shixun_work/shixun_work', filename: filename, stylesheets: stylesheets
   end
diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index 742deb85b..6af88de33 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -418,7 +418,7 @@ module ExportHelper
       end
     end
 
-    out_file_name = "#{Time.now.to_i}_#{homework_common.name}.zip"
+    out_file_name = "作品附件_#{homework_common&.course&.name}_#{homework_common.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}.zip"
     out_file_name.gsub!(" ", "-")
     out_file_name.gsub!("/", "_")
     out_file = find_or_pack(homework_common, homework_common.user_id, digests.sort){
@@ -496,8 +496,8 @@ module ExportHelper
 
   def make_zip_name(work, file_name="")
     Rails.logger.info("######################file_name: #{file_name}")
-    name = file_name === "" ? "" : (file_name[0, file_name.rindex('.')]+"_")
-    "#{name}#{work.user.real_name}_#{((work.user.student_id.nil?) ? "" : work.user.student_id)}"
+    # name = file_name === "" ? "" : (file_name[0, file_name.rindex('.')]+"_")
+    "#{work&.user&.student_id}_#{work.&user.&real_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
   end
 
   def zipping(zip_name_refer, files_paths, output_path, is_attachment=false, not_exist_file=[])
diff --git a/app/services/batch_export_shixun_report_service.rb b/app/services/batch_export_shixun_report_service.rb
index d71235790..253eb4480 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}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+    @_filename ||= "实训报告_#{homework&.course&.name}_#{homework.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
   end
 
   def zip
diff --git a/app/services/exercise_user_pdf_service.rb b/app/services/exercise_user_pdf_service.rb
index 73711192f..6891e53ea 100644
--- a/app/services/exercise_user_pdf_service.rb
+++ b/app/services/exercise_user_pdf_service.rb
@@ -15,8 +15,8 @@ class ExerciseUserPdfService
   end
 
   def filename
-    user_course = @course.course_members.find_by(user_id:@ex_user_user.id)&.course_group_name
-    exercise_user_name = "#{@ex_user_user.real_name}_#{user_course.present? ? user_course : "未分班"}_#{exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M')}"
+    # user_course = @course.course_members.find_by(user_id:@ex_user_user.id)&.course_group_name
+    exercise_user_name = "#{@ex_user_user&.student_id}_#{@ex_user_user.real_name}_#{exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M')}"
     "#{exercise_user_name.strip}.pdf"
   end
 
diff --git a/app/services/export_exercises_service.rb b/app/services/export_exercises_service.rb
index ca2d347a6..1f1e15326 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}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
+    exercise_export_name = "学生答题_#{exercise&.course&.name}_#{exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
     "#{exercise_export_name.strip}.zip"
   end
 
diff --git a/app/services/export_shixun_report_service.rb b/app/services/export_shixun_report_service.rb
index f9da3d6f2..57b955762 100644
--- a/app/services/export_shixun_report_service.rb
+++ b/app/services/export_shixun_report_service.rb
@@ -10,7 +10,7 @@ class ExportShixunReportService
   end
 
   def filename
-    @_filename ||= "#{homework.name}-#{work.user&.student_id}-#{work.user.real_name}.pdf".gsub(' ', '-').gsub('/', '_')
+    @_filename ||= "#{work.user&.student_id}_#{work.user.real_name}_#{homework.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}.pdf".gsub(' ', '-').gsub('/', '_')
   end
 
   def prepare_binding