diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index b4677f4e3..f6872e533 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -92,6 +92,7 @@ class StudentWorksController < ApplicationController
         student_work.commit_time = Time.now
         student_work.update_time = Time.now
         student_work.commit_user_id = current_user.id
+        student_work.update_user_id = current_user.id
         student_work.group_id = @homework.homework_type == "group" ? @homework.max_group_id : 0
 
         #提交作品时，计算是否迟交
@@ -112,7 +113,7 @@ class StudentWorksController < ApplicationController
                                          homework_common_id: @homework.id, project_id: student_work.project_id,
                                          late_penalty: student_work.late_penalty, work_status: student_work.work_status,
                                          commit_time: Time.now, update_time: Time.now, group_id: student_work.group_id,
-                                         commit_user_id: current_user.id)
+                                         commit_user_id: current_user.id, update_user_id: current_user.id)
               stu_work.save!
               student_work.attachments.each do |attachment|
                 att = attachment.copy
@@ -156,6 +157,7 @@ class StudentWorksController < ApplicationController
       begin
         @work.description = params[:description]
         @work.update_time = Time.now
+        @work.update_user_id = current_user.id
         # @work.commit_user_id = current_user.id
         if @work.save!
           Attachment.associate_container(params[:attachment_ids], @work.id, @work.class)
@@ -172,7 +174,7 @@ class StudentWorksController < ApplicationController
             # 原成员更新描述、更新时间以及附件
             @homework.student_works.where(group_id: @work.group_id, user_id: (work_user_ids & params_user_ids)).each do |work|
               # work.update_attributes(update_time: Time.now, description: @work.description, commit_user_id: current_user.id)
-              work.update_attributes(update_time: Time.now, description: @work.description)
+              work.update_attributes(update_time: Time.now, description: @work.description, update_user_id: current_user.id)
               work.attachments.destroy_all
               @work.attachments.each do |attachment|
                 att = attachment.copy
@@ -192,7 +194,7 @@ class StudentWorksController < ApplicationController
             @homework.student_works.where(group_id: @work.group_id, user_id: delete_user_ids).
                 update_all(work_status: 0, description: nil, late_penalty: 0, commit_time: nil, update_time: nil,
                            final_score: nil, teacher_score: nil, student_score: nil, teaching_asistant_score: nil,
-                           work_score: nil, project_id: 0, group_id: 0, commit_user_id: nil)
+                           work_score: nil, project_id: 0, group_id: 0, commit_user_id: nil, update_user_id: nil)
 
             # 新增加的成员
             (params_user_ids - work_user_ids).each do |user_id|
@@ -200,7 +202,7 @@ class StudentWorksController < ApplicationController
               stu_work.update_attributes(user_id: user_id, description: @work.description, homework_common_id: @homework.id,
                                          project_id: @work.project_id, late_penalty: @work.late_penalty,
                                          work_status: @work.work_status, commit_time: Time.now, update_time: Time.now,
-                                         group_id: @work.group_id, commit_user_id: @work.commit_user_id)
+                                         group_id: @work.group_id, commit_user_id: @work.commit_user_id, update_user_id: current_user.id)
               @work.attachments.each do |attachment|
                 att = attachment.copy
                 att.author_id = attachment.author_id
diff --git a/app/models/student_work.rb b/app/models/student_work.rb
index 074068273..168cfeb68 100644
--- a/app/models/student_work.rb
+++ b/app/models/student_work.rb
@@ -2,6 +2,7 @@ class StudentWork < ApplicationRecord
   #学生提交作品表 #work_status :0 未提交  1 已提交  2 迟交
   belongs_to :user
   belongs_to :commit_user, class_name: 'User', foreign_key: :commit_user_id, optional: true
+  belongs_to :update_user, class_name: 'User', foreign_key: :update_user_id, optional: true
   belongs_to :homework_common
   belongs_to :myshixun, optional: true
   has_many :student_works_evaluation_distributions, dependent: :destroy
diff --git a/app/views/student_works/show.json.jbuilder b/app/views/student_works/show.json.jbuilder
index 5756ac9cb..192e4d8ec 100644
--- a/app/views/student_works/show.json.jbuilder
+++ b/app/views/student_works/show.json.jbuilder
@@ -5,7 +5,8 @@ json.is_evaluation @is_evaluation
 json.author_name @is_evaluation ? "匿名" : @work.user.real_name
 json.is_leader_work @work.user_id == @work.commit_user_id if @homework.homework_type == "group"
 json.is_author @is_author
-json.update_user_name @is_evaluation ? "匿名" : @work.commit_user.try(:real_name)
+json.commit_user_name @is_evaluation ? "匿名" : @work.commit_user.try(:real_name)
+json.update_user_name @is_evaluation ? "匿名" : @work.update_user.try(:real_name)
 
 json.update_atta @homework.late_duration && @is_author
 
diff --git a/db/migrate/20190828011222_add_update_user_id_to_student_works.rb b/db/migrate/20190828011222_add_update_user_id_to_student_works.rb
new file mode 100644
index 000000000..c8e007998
--- /dev/null
+++ b/db/migrate/20190828011222_add_update_user_id_to_student_works.rb
@@ -0,0 +1,6 @@
+class AddUpdateUserIdToStudentWorks < ActiveRecord::Migration[5.2]
+  def change
+    add_column :student_works, :update_user_id, :integer
+    StudentWork.update_all("update_user_id = commit_user_id")
+  end
+end