diff --git a/lib/tasks/userscore.rake b/lib/tasks/userscore.rake
index 144b9c9b..9bc54f2c 100644
--- a/lib/tasks/userscore.rake
+++ b/lib/tasks/userscore.rake
@@ -4,9 +4,10 @@ task :user_score do
 end
 
 namespace :user_score do
-	desc "calculating user score"
-  # Rails.env = 'production'
-	task :calculate => :environment do
+  desc "calculating user score"
+  task :calculate => :environment do
+    puts "truncating table...#{Rails.env}"
+    UserScore.destroy_all
     puts "loading..."
     # collaboration 协同得分
     users = {}
@@ -40,10 +41,13 @@ namespace :user_score do
     end
     puts ":reply_posting calculate Completed. collaboration users count: #{users.count}"
 
-    users.each do |user_id, score|
-      UserScore.find_or_create_by_user_id(user_id).update_attribute(:collaboration, score)
+    UserScore.transaction do
+      users.each do |user_id, score|
+        UserScore.find_or_create_by_user_id(user_id).update_attribute(:collaboration, score)
+      end
     end
     puts "=== UserScore#collaboration calculate Completed. collaboration users count: #{users.count}"
+    puts ""
 
     users.clear
 
@@ -55,23 +59,26 @@ namespace :user_score do
     end
     puts ":followed_by calculate Completed. influence users count: #{users_influence.count}"
 
-    users_influence.each do |user_id, score|
-      UserScore.find_or_create_by_user_id(user_id).update_attribute(:influence, score)
+    UserScore.transaction do
+      users_influence.each do |user_id, score|
+        UserScore.find_or_create_by_user_id(user_id).update_attribute(:influence, score)
+      end
     end
     puts "=== UserScore#influence calculate Completed. influence users count: #{users_influence.count}"
+    puts ""
     # skill 技术得分
     # 顶踩帖
     users_skill = {}
     PraiseTread.where("praise_tread_object_type = 'Memo' || praise_tread_object_type = 'Message'").all.each do |pt|
       obj = PraiseTread.find_object_by_type_and_id(pt.praise_tread_object_type, pt.praise_tread_object_id)
       if obj.nil?
-         next
+        next
       end
       target_user = obj.author
       level = pt.user.get_level
       if pt.praise_or_tread == 0
-      #踩帖
-        users_skill[pt.user.id] = users_skill[pt.user.id].to_i - 2           #踩别人帖-2分
+        #踩帖
+        users_skill[pt.user.id] = users_skill[pt.user.id].to_i - 2 #踩别人帖-2分
         if level == 1
           users_skill[target_user.id] = users_skill[target_user.id].to_i - 2 #帖子被一级会员踩-2分  add praise_tread
         elsif  level == 2
@@ -80,7 +87,7 @@ namespace :user_score do
           users_skill[target_user.id] = users_skill[target_user.id].to_i - 6 #帖子被三级会员踩-6分  add praise_tread
         end
       elsif pt.praise_or_tread == 1
-      #顶贴
+        #顶贴
         if level == 1
           users_skill[target_user.id] = users_skill[target_user.id].to_i + 4 #帖子被一级会员顶+4分  add praise_tread
         elsif level == 2
@@ -91,11 +98,14 @@ namespace :user_score do
       end
     end
     puts ":praised_by_user and :treaded_by_user calculate Completed. skill users count: #{users_skill.count}"
+    UserScore.transaction do
       users_skill.each do |user_id, score|
         UserScore.find_or_create_by_user_id(user_id).update_attribute(:skill, score)
       end
-      puts "=== UserScore#skill calculate Completed. skill users count: #{users_skill.count}"
-    
+    end
+    puts "=== UserScore#skill calculate Completed. skill users count: #{users_skill.count}"
+    puts ""
+
     # active 项目贡献得分
     users_active = {}
     # 提交代码
@@ -115,20 +125,20 @@ namespace :user_score do
     end
     puts ":push_document calculate Completed. active users count: #{users_active.count}"
     #提交附件
-   Attachment.includes(:author).all.each do |attachment|
-     #if attachment.container_id_changed?
-     #  type = attachment.container_type
-     #  types = %w|Document News Version Project Issue Message WikiPage|
-     #  if types.include?(type)
-         if attachment.author.nil?
-           next
-         end
-         users_active[attachment.author.id] = users_active[attachment.author.id].to_i + 4
-     #  end
-     #end
-   end
-  puts ":push_file calculate Completed. active users count: #{users_active.count}"
-  #更新完成度
+    Attachment.includes(:author).all.each do |attachment|
+      #if attachment.container_id_changed?
+      #  type = attachment.container_type
+      #  types = %w|Document News Version Project Issue Message WikiPage|
+      #  if types.include?(type)
+      if attachment.author.nil?
+        next
+      end
+      users_active[attachment.author.id] = users_active[attachment.author.id].to_i + 4
+      #  end
+      #end
+    end
+    puts ":push_file calculate Completed. active users count: #{users_active.count}"
+    #更新完成度
     Journal.joins(:details, :user).where("#{JournalDetail.table_name}.prop_key = 'done_ratio'").each do |j|
       users_active[j.user.id] = users_active[j.user.id].to_i + 2
     end
@@ -139,10 +149,14 @@ namespace :user_score do
     end
     puts ":post_issue calculate Completed. active users count: #{users_active.count}"
 
-    users_active.each do |user_id, score|
-      UserScore.find_or_create_by_user_id(user_id).update_attribute(:active, score)
+
+    UserScore.transaction do
+      users_active.each do |user_id, score|
+        UserScore.find_or_create_by_user_id(user_id).update_attribute(:active, score)
+      end
     end
     puts "=== UserScore#active calculate Completed. active users count: #{users_active.count}"
+    puts ""
 
   end
 end
@@ -151,11 +165,11 @@ desc "create tmp file, to test"
 file 'tmp/test.yml' do
   require 'yaml'
   var = {
-  	:name => "name",
-  	:age => "age",
-  	:agent => "agent"
+      :name => "name",
+      :age => "age",
+      :agent => "agent"
   }
   File.open('tmp/test.yml', 'w') do |f|
-    f.write YAML.dump({'conf' => var })
+    f.write YAML.dump({'conf' => var})
   end
 end
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