diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 7f1383bc..c1c25151 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -132,6 +132,15 @@ class ApplicationController < ActionController::Base
     end
   end
 
+  DCODES = %W(2 3 4 5 6 7 8 9 a b c f e f g h i j k l m n o p q r s t u v w x y z)
+  # 随机生成字符
+  def generates_identifier(container, num)
+    code = DCODES.sample(num).join
+    while container.exists?(identifier: code) do
+      code = DCODES.sample(num).join
+    end
+    code
+  end
 
   def ec_public_auth major_school
     unless User.current.admin? || major_school.template_major || major_school.school.users.where(:id => User.current.id).count > 0 ||
diff --git a/app/controllers/myshixuns_controller.rb b/app/controllers/myshixuns_controller.rb
index b1ac0073..6316446e 100644
--- a/app/controllers/myshixuns_controller.rb
+++ b/app/controllers/myshixuns_controller.rb
@@ -535,7 +535,7 @@ class MyshixunsController < ApplicationController
         end
         logger.info("#############status: #{status}")
         logger.info("#############resubmit: #{resubmit}")
-        record = EvaluateRecord.where(:game_id => game_id).first
+        record = EvaluateRecord.where(:identifier => params[:sec_key]).first
         logger.info("training_task_status start#3**#{game_id}**** #{Time.now.strftime("%Y-%m-%d %H:%M:%S.%L")}")
 
         # status：0表示评测成功
diff --git a/app/services/games_service.rb b/app/services/games_service.rb
index 8b5e486d..91645e84 100644
--- a/app/services/games_service.rb
+++ b/app/services/games_service.rb
@@ -347,10 +347,12 @@ class GamesService
     rev = params[:rev] ? params[:rev] : "master"
     content_modified = 0
     ActiveRecord::Base.transaction do
+      sec_key = generates_identifier(EvaluateRecord, 10)
       # params[:evaluate] 实训评测时更新必须给的参数，需要依据该参数做性能统计，其它类型的更新可以跳过
       # 自动保存的时候evaluate为0；点评测的时候为1
       if params[:evaluate] == 1
-        record = EvaluateRecord.create!(:user_id => current_user.id, :shixun_id => @myshixun.shixun.id, :game_id => @game.id)
+        record = EvaluateRecord.create!(:user_id => current_user.id, :shixun_id => @myshixun.shixun.id,
+                                        :game_id => @game.id, :identifier => sec_key)
         Rails.logger.warn("##game is is #{@game.id}, record id is #{record.id}, time is**** #{Time.now.strftime("%Y-%m-%d %H:%M:%S.%L")}")
         # @myshixun.student_works.update_all(:update_time => Time.now) if !@myshixun.student_works.blank?
         student_work_time = format("%.3f",  (Time.now.to_f - record.created_at.to_f)).to_f
@@ -385,7 +387,7 @@ class GamesService
       if content != last_content && code_file.blank?
         raise("update file failed")
       else
-        return {:success => "success", :resubmit => resubmit ,:content_modified => content_modified}
+        return {:success => "success", :resubmit => resubmit ,:content_modified => content_modified, sec_key: record.identifier}
       end
     end
   rescue Exception => e
@@ -546,7 +548,7 @@ class GamesService
               :testCases => "#{testCases}", :resubmit => "#{resubmit}", :times => params[:first].to_i, :podType => shixun.webssh,
               :containers => "#{Base64.urlsafe_encode64(container_limit(shixun.mirror_repositories))}", :tpmScript => "#{tpmScript}",
               :timeLimit => "#{shixun.exec_time}", :content_modified => content_modified, :persistenceName => shixun.identifier,
-              :isPublished => (shixun.status < 2 ? 0 : 1)}
+              :isPublished => (shixun.status < 2 ? 0 : 1), :sec_key => params[:sec_key]}
 
     # 评测有文件输出的需要特殊传字段 path：表示文件存储的位置
     params['file'] = Base64.urlsafe_encode64({:path => "#{game_challenge.picture_path}"}.to_json) if game_challenge.picture_path.present?
@@ -569,7 +571,8 @@ class GamesService
     # ----单测模式end
 
     return {:result => "success", :resubmit => resubmit, :ableToCreate => res['ableToCreate'], :waitNum => res['waitNum'],
-            :waitingTime => res['waitingTime'], :position => game_challenge.position, :port => res['port'], :had_done => game.had_done }
+            :waitingTime => res['waitingTime'], :position => game_challenge.position, :port => res['port'],
+            :had_done => game.had_done}
   rescue Exception => e
     Rails.logger.error("评测出错，详情：" + e.message)
     return {:result => 'fail',  :contents =>"实训云平台繁忙（繁忙等级：502），请稍后刷新并重试", :position => game_challenge.position, :had_done => game.had_done}
@@ -878,7 +881,7 @@ class GamesService
     mirror_name = shixun.mirror_name
 
     # 轮询结束，更新评测耗时
-    e_record = EvaluateRecord.where(:game_id => game.id).first
+    e_record = EvaluateRecord.where(:identifier => params[:sec_key]).first
     if game_status == 0 || game_status == 2
       if e_record
         front_js = format("%.3f",  (Time.now.to_f - e_record.try(:updated_at).to_f)).to_f
diff --git a/db/migrate/20190524005242_add_identifier_to_evaluate_records.rb b/db/migrate/20190524005242_add_identifier_to_evaluate_records.rb
new file mode 100644
index 00000000..7fe00179
--- /dev/null
+++ b/db/migrate/20190524005242_add_identifier_to_evaluate_records.rb
@@ -0,0 +1,8 @@
+class AddIdentifierToEvaluateRecords < ActiveRecord::Migration
+  def change
+    add_column :evaluate_records, :identifier, :string
+    add_index :evaluate_records, :identifier, unique: true
+    remove_index :evaluate_records, :name => :game
+    remove_index :evaluate_records, :name => :index_evaluate_records_on_user_id
+  end
+end