diff --git a/lib/tasks/sync_evaluate.rake b/lib/tasks/sync_evaluate.rake
index f82d73126..14dc39b50 100644
--- a/lib/tasks/sync_evaluate.rake
+++ b/lib/tasks/sync_evaluate.rake
@@ -2,16 +2,18 @@ desc "同步学院或者单位评测数"
 
 namespace :sync_evaluate do
   task outpus_count: :environment do
-    School.find_each do |school|
-      puts school.id
-      evaluate_count = Game.find_by_sql("select sum(g.evaluate_count) as e_count from games g, user_extensions ue where
-                        g.user_id = ue.user_id and ue.school_id = '#{school.id}'").first.try(:e_count)
+    School.find_in_batches(batch_size: 500) do |school|
+      Parallel.each_with_index(school, in_processes: 4) do |s|
+        puts "school_id:#{s.id}"
+        evaluate_count = Game.find_by_sql("select sum(g.evaluate_count) as e_count from games g, user_extensions ue where
+                        g.user_id = ue.user_id and ue.school_id = '#{s.id}'").first.try(:e_count)
 
-      report =  SchoolReport.find_or_initialize_by(school_id: school.id)
-      report.school_name = school.name
-      report.shixun_evaluate_count = evaluate_count
+        report =  SchoolReport.find_or_initialize_by(school_id: s.id)
+        report.school_name = s.name
+        report.shixun_evaluate_count = evaluate_count
 
-      report.save
+        report.save
+      end
     end
   end
 end
\ No newline at end of file