diff --git a/Gemfile b/Gemfile
index 3bfe246a4..859090feb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -109,3 +109,5 @@ gem 'request_store'
 
 # 敏感词汇
 gem 'harmonious_dictionary', '~> 0.0.1'
+
+gem 'parallel', '~> 1.19', '>= 1.19.1'
diff --git a/app/services/subjects/course_used_info_service.rb b/app/services/subjects/course_used_info_service.rb
index 2561f3aa4..5ae5abe1c 100644
--- a/app/services/subjects/course_used_info_service.rb
+++ b/app/services/subjects/course_used_info_service.rb
@@ -21,17 +21,19 @@ class Subjects::CourseUsedInfoService < ApplicationService
     # choice_shixun_num: 选用该课程实训的个数（去重）
     # choice_shixun_frequency: 选用该课程实训的次数
     course_info = []
-    schools.map do |school|
-      name = school.name
-      course_count = school.course_count
-      student_count = school.courses.joins(:course_members).where(course_members: {role: 4, course_id: course_ids}).size
-      shixun_ids = school.courses.joins(homework_commons: :homework_commons_shixun)
-                             .where(homework_commons: {id: homework_common_ids})
-                             .pluck("homework_commons_shixuns.shixun_id")
-      choice_shixun_frequency = shixun_ids.size
-      choice_shixun_num = shixun_ids.uniq.size
-      course_info << {school_id: school.id, school_name: name, course_count: course_count, student_count: student_count,
-                      choice_shixun_num: choice_shixun_num, choice_shixun_frequency: choice_shixun_frequency}
+    schools.find_in_batches do |s|
+      Parallel.each(s) do |school|
+        name = school.name
+        course_count = school.course_count
+        student_count = school.courses.joins(:course_members).where(course_members: {role: 4, course_id: course_ids}).size
+        shixun_ids = school.courses.joins(homework_commons: :homework_commons_shixun)
+                         .where(homework_commons: {id: homework_common_ids})
+                         .pluck("homework_commons_shixuns.shixun_id")
+        choice_shixun_frequency = shixun_ids.size
+        choice_shixun_num = shixun_ids.uniq.size
+        course_info << {school_id: school.id, school_name: name, course_count: course_count, student_count: student_count,
+                        choice_shixun_num: choice_shixun_num, choice_shixun_frequency: choice_shixun_frequency}
+      end
     end
     course_info
   end
diff --git a/app/services/subjects/user_used_info_service.rb b/app/services/subjects/user_used_info_service.rb
index e4442a2f4..82fc5316b 100644
--- a/app/services/subjects/user_used_info_service.rb
+++ b/app/services/subjects/user_used_info_service.rb
@@ -1,6 +1,8 @@
 class Subjects::UserUsedInfoService < ApplicationService
+  require 'parallel'
   attr_reader :subject, :shixun_ids
 
+
   def initialize(subject)
     @subject = subject
     @shixun_ids = subject.shixuns.pluck(:id)
@@ -10,18 +12,21 @@ class Subjects::UserUsedInfoService < ApplicationService
   def call
     users_info = []
     users = User.includes(myshixuns: :games).where(myshixuns: {shixun_id: shixun_ids}, games: {status: 2}, users: {is_test: false})
-    users.find_each do |user|
-      myshixuns = user.myshixuns.select{|m| shixun_ids.include?(m.shixun_id)}
-      name =  "#{user.lastname}#{user.firstname}"
-      passed_myshixun_count = myshixuns.select{|m| m.status == 1}.size
-      passed_games_count = myshixuns.map{|m| m.games.select{|g| g.status == 2}.size }.size
-      code_line_count = 0
-      evaluate_count = myshixuns.map{|m| m.output_times }.sum
-      cost_time = myshixuns.map{|m|m.total_cost_time }.sum
-      users_info << {user_id: user.id, name: name, passed_myshixun_count: passed_myshixun_count,
-                     passed_games_count: passed_games_count, code_line_count: code_line_count,
-                    evaluate_count: evaluate_count, cost_time: cost_time}
+    users.find_in_batches do |u|
+      Parallel.each(u, in_processes: 5) do |user|
+        myshixuns = user.myshixuns.select{|m| shixun_ids.include?(m.shixun_id)}
+        name =  "#{user.lastname}#{user.firstname}"
+        passed_myshixun_count = myshixuns.select{|m| m.status == 1}.size
+        passed_games_count = myshixuns.map{|m| m.games.select{|g| g.status == 2}.size }.size
+        code_line_count = 0
+        evaluate_count = myshixuns.map{|m| m.output_times }.sum
+        cost_time = myshixuns.map{|m|m.total_cost_time }.sum
+        users_info << {user_id: user.id, name: name, passed_myshixun_count: passed_myshixun_count,
+                       passed_games_count: passed_games_count, code_line_count: code_line_count,
+                       evaluate_count: evaluate_count, cost_time: cost_time}
+      end
     end
+
     users_info
   end
 
diff --git a/lib/tasks/statistic_subject_info.rake b/lib/tasks/statistic_subject_info.rake
index 180766cd7..30516e28f 100644
--- a/lib/tasks/statistic_subject_info.rake
+++ b/lib/tasks/statistic_subject_info.rake
@@ -51,7 +51,7 @@ namespace :subjects do
       puts("---------------------course_info_statistic: #{subject.id}")
       Rails.logger.info("---------------------course_info_statistic: #{subject.id}")
       data = Subjects::CourseUsedInfoService.call(subject)
-      data.each do |key|
+      Parallel.map(data) do |key|
         next if key[:school_id].nil?
         str += ", " unless str.empty?
         str += ("(#{subject.id}, #{key[:school_id]}, '#{key[:school_name]}', #{key[:course_count]}, " +
@@ -125,7 +125,7 @@ namespace :subjects do
     subjects.find_each(batch_size: 50) do |subject|
       puts("---------------------user_info_statistic: #{subject.id}")
       data = Subjects::UserUsedInfoService.call(subject)
-      data.each do |key|
+      Parallel.each(data) do |key|
         next if key[:user_id].nil?
         str += ", " unless str.empty?
         str += ("(#{key[:user_id]}, #{subject.id}, '#{key[:name].gsub(/'/, '"')}', #{key[:passed_myshixun_count]}, " +