diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index 31e1ecf45..12f1ccdae 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -163,9 +163,12 @@ module ExportHelper
     count_2 = common_homeworks.size
     count_3 = group_homeworks.size
     count_4 = tasks.size
+
+    all_user_ids = all_members.pluck(:user_id)
+
     #实训作业
     shixun_homeworks.each_with_index do |s,index|
-      all_student_works = s.score_student_works   #该实训题的全部用户回答
+      all_student_works = s.score_student_works.select{|work| all_user_ids.include?(work.user_id)}   #该实训题的全部用户回答
       title_no = index.to_i + 1
       student_work_to_xlsx(all_student_works,s)
       shixun_work_display_name = format_sheet_name (title_no.to_s + "." + s.name).strip.first(30)
@@ -175,7 +178,7 @@ module ExportHelper
 
     #普通作业
     common_homeworks.each_with_index do |c,index|
-      all_student_works = c.score_student_works   #当前用户的对该作业的回答
+      all_student_works = c.score_student_works.select{|work| all_user_ids.include?(work.user_id)}   #当前用户的对该作业的回答
       title_no = count_1 + index.to_i + 1
       student_work_to_xlsx(all_student_works,c)
 
@@ -187,7 +190,7 @@ module ExportHelper
 
     #分组作业
     group_homeworks.each_with_index do |c,index|
-      all_student_works = c.score_student_works   #当前用户的对该作业的回答
+      all_student_works = c.score_student_works.select{|work| all_user_ids.include?(work.user_id)}   #当前用户的对该作业的回答
       title_no = count_1 + count_2 + index.to_i + 1
       student_work_to_xlsx(all_student_works,c)
       work_name = format_sheet_name (title_no.to_s + "." + c.name).strip.first(30)
@@ -197,7 +200,7 @@ module ExportHelper
 
     #毕设任务
     tasks.each_with_index do |c,index|
-      all_student_works = c.score_graduation_works   #当前用户的对该作业的回答
+      all_student_works = c.score_graduation_works.select{|work| all_user_ids.include?(work.user_id)}   #当前用户的对该作业的回答
       title_no = count_1 + count_2 + count_3 + index.to_i + 1
       graduation_work_to_xlsx(all_student_works,c,current_user)
       work_name = format_sheet_name (title_no.to_s + "." + c.name).strip.first(30)
@@ -207,7 +210,7 @@ module ExportHelper
 
     #试卷的导出
     exercises.each_with_index do |c,index|
-      all_student_works = c.score_exercise_users   #当前用户的对该作业的回答
+      all_student_works = c.score_exercise_users.select{|work| all_user_ids.include?(work.user_id)}   #当前用户的对该作业的回答
       title_no = count_1 + count_2 + count_3 + count_4 + index.to_i + 1
       get_export_users(c,course,all_student_works)
       work_name = format_sheet_name (title_no.to_s + "." + c.exercise_name).strip.first(30)