diff --git a/Gemfile b/Gemfile
index 29b2716a9..362be8642 100644
--- a/Gemfile
+++ b/Gemfile
@@ -58,8 +58,6 @@ group :test do
   #end
 end
 
- # gem 'rspec-rails' , '2.13.1'
- # gem 'guard-rspec','2.5.0'
 # Gems used only for assets and not required
 # in production environments by default.
 group :assets do
diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 23b080d94..23d4c3a16 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -108,7 +108,7 @@ class AttachmentsController < ApplicationController
     end
 
   rescue => e
-    redirect_to "http://" + (Setting.host_name.to_s) +"/file_not_found.html"
+    redirect_to "http:  //" + (Setting.host_name.to_s) +"/file_not_found.html"
   end
 
   #更新资源文件类型
@@ -182,6 +182,8 @@ class AttachmentsController < ApplicationController
       return
     end
 
+
+    logger.debug "upload .....  "
     @attachment = Attachment.new(:file => request.raw_post)
     @attachment.author = User.current
     if !params[:project].nil?
@@ -190,6 +192,8 @@ class AttachmentsController < ApplicationController
     end
     @attachment.filename = params[:filename].presence || Redmine::Utils.random_hex(16)
     saved = @attachment.save
+    logger.debug "upload save .....  "
+    logger.debug @attchement
 
     respond_to do |format|
       format.js
diff --git a/app/controllers/zipdown_controller.rb b/app/controllers/zipdown_controller.rb
index 6c5385115..75ffe75bd 100644
--- a/app/controllers/zipdown_controller.rb
+++ b/app/controllers/zipdown_controller.rb
@@ -7,6 +7,14 @@ class ZipdownController < ApplicationController
   SAVE_FOLDER = "#{Rails.root}/files"
   OUTPUT_FOLDER = "#{Rails.root}/tmp/archiveZip"
 
+  #统一下载功能
+  def download
+    begin
+      send_file "#{OUTPUT_FOLDER}/#{params[:file]}", :filename => params[:filename], :type => detect_content_type(params[:file])
+    rescue => e
+      render file: 'public/no_file_found.html'
+    end
+  end
 
   def assort
     if params[:obj_class] == "Bid"
@@ -21,8 +29,14 @@ class ZipdownController < ApplicationController
     else
       logger.error "[ZipDown#assort] ===> #{params[:obj_class]} unKown !!"
     end
-    send_file zipfile, :filename => bid.name + ".zip", :type => detect_content_type(zipfile) if zipfile
 
+    if zipfile
+      if zipfile.length > 1
+        @mut_down_files = zipfile.map{|x| File.basename(x)}
+      else
+        send_file zipfile, :filename => bid.name + ".zip", :type => detect_content_type(zipfile)
+      end
+    end
   #rescue Exception => e
   #  render file: 'public/no_file_found.html'
   end
@@ -71,7 +85,14 @@ class ZipdownController < ApplicationController
         bid_homework_path << zip_homework_by_user(homeattach)
       end
     end
-    zipping "#{Time.now.to_i}_#{bid.name}.zip", bid_homework_path, OUTPUT_FOLDER
+
+    zips = split_pack_files(bid_homework_path, Setting.pack_attachment_max_size.to_i)
+    x = 0
+
+    zips.map { |o|
+      x += 1
+      zipping "#{Time.now.to_i}_#{bid.name}_#{x}.zip", o, OUTPUT_FOLDER
+    }
   end
 
   def zip_homework_by_user(homeattach)
@@ -93,15 +114,21 @@ class ZipdownController < ApplicationController
   def zipping(zip_name_refer, files_paths, output_path, is_attachment=false, not_exist_file=[])
     # 输入待打包的文件列表，已经打包文件定位到ouput_path
     ic = Iconv.new('GBK//IGNORE', 'UTF-8//IGNORE')
-    input_filename = files_paths
 
     rename_zipfile = zip_name_refer ||= "#{Time.now.to_i.to_s}.zip"
     zipfile_name = "#{output_path}/#{rename_zipfile}"
 
     Dir.mkdir(File.dirname(zipfile_name)) unless File.exist?(File.dirname(zipfile_name))
 
+    unless is_attachment
+      #都是zip合并，没必要再费力压缩了
+      Zip.default_compression = Zlib::NO_COMPRESSION
+    else
+      Zip.default_compression = Zlib::DEFAULT_COMPRESSION
+    end
+
     Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
-      input_filename.each do |filename|
+      files_paths.each do |filename|
         flag = true
         index = 1
         rename_file = ic.iconv( (File.basename(filename)) ).to_s
@@ -128,6 +155,34 @@ class ZipdownController < ApplicationController
   #  logger.error "[zipdown#zipping] ===> #{e}"
   #  @error = e
   end
+
+  # 合理分配文件打包
+  # 如果小于 pack_attachment_max_size, 则返回单个文件
+  # 反之则切分为多个文件组返回
+  def split_pack_files(files, pack_attachment_max_size)
+    max_size = 0
+    last_files = []
+    ret_files = []
+    files.each do |f|
+      if (max_size += File.size(f)) > pack_attachment_max_size
+        max_size = 0
+        if last_files.empty? #如果单个文件超过大小，也将此文件作为一组
+          ret_files << [f]
+          last_files.clear
+        else
+          ret_files << last_files
+          last_files.clear
+          redo
+        end
+      else
+        last_files << f
+      end
+    end
+
+    ret_files << last_files unless last_files.empty?
+    ret_files
+  end
+
   def detect_content_type(name)
     content_type = Redmine::MimeType.of(name)
     content_type.to_s
diff --git a/app/views/settings/_general.html.erb b/app/views/settings/_general.html.erb
index ebb3904da..763b65515 100644
--- a/app/views/settings/_general.html.erb
+++ b/app/views/settings/_general.html.erb
@@ -7,6 +7,7 @@
 <%= wikitoolbar_for 'settings_welcome_text' %>
 
 <p style="padding-left: 180px;"><%= setting_text_field :attachment_max_size, :size => 6 %> <%= l(:"number.human.storage_units.units.kb") %></p>
+<p style="padding-left: 180px;"><%= setting_text_field :pack_attachment_max_size, :size => 6 %> <%= l(:"number.human.storage_units.units.kb") %></p>
 
 <p style="padding-left: 180px;"><%= setting_text_field :per_page_options, :size => 20 %>
 <em class="info"><%= l(:text_comma_separated) %></em></p>
diff --git a/app/views/zipdown/assort.html.erb b/app/views/zipdown/assort.html.erb
index c9056b4fa..3cf873226 100644
--- a/app/views/zipdown/assort.html.erb
+++ b/app/views/zipdown/assort.html.erb
@@ -1,2 +1,11 @@
-<h1>Download Status:</h1>
-<%= @error.class %>
\ No newline at end of file
+<% unless @mut_down_files %>
+    <h1>Download Status:</h1>
+    <%= @error.class %>
+<% else %>
+    <h1>下载文件包太大，分成<%= @mut_down_files.count %>个下载包</h1>
+    <ul>
+      <% @mut_down_files.each_with_index do |file,i| %>
+          <li><%= link_to "第#{i+1}个文件包", zipdown_download_path(file: File.basename(file)) %></li>
+      <% end %>
+    </ul>
+<% end %>
\ No newline at end of file
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 910eb0f98..1430e5df1 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -177,6 +177,7 @@ en:
   setting_login_required: Authentication required
   setting_self_registration: Self-registration
   setting_attachment_max_size: Maximum attachment size
+  setting_pack_attachment_max_size: Maximum pack attachment size
   setting_issues_export_limit: Issues export limit
   setting_mail_from: Emission email address
   setting_bcc_recipients: Blind carbon copy recipients (bcc)
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index f3879421a..282218905 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -196,6 +196,7 @@ zh:
   setting_login_required: 要求认证
   setting_self_registration: 允许自注册
   setting_attachment_max_size: 附件大小限制
+  setting_pack_attachment_max_size: 附件打包最大限制
   setting_issues_export_limit: 问题导出条目的限制
   setting_mail_from: 邮件发件人地址
   setting_bcc_recipients: 使用密件抄送 (bcc)
diff --git a/config/routes.rb b/config/routes.rb
index 3ec814839..1417231b2 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -105,6 +105,7 @@ RedmineApp::Application.routes.draw do
   namespace :zipdown do
     match 'assort'
     match 'download_user_homework', :as => :download_user_homework
+    match 'download'
   end
   namespace :test do
     match 'courselist'
diff --git a/config/settings.yml b/config/settings.yml
index 381e8a302..56cb8ac6c 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -46,7 +46,10 @@ session_timeout:
   default: 2880
 attachment_max_size:
   format: int
-  default: 5120
+  default: 51200
+pack_attachment_max_size:
+  format: int
+  default: 51200
 issues_export_limit:
   format: int
   default: 500
diff --git a/db/migrate/20150309090143_add_pack_attachment_max_size_to_settings.rb b/db/migrate/20150309090143_add_pack_attachment_max_size_to_settings.rb
new file mode 100644
index 000000000..95887a3e2
--- /dev/null
+++ b/db/migrate/20150309090143_add_pack_attachment_max_size_to_settings.rb
@@ -0,0 +1,11 @@
+class AddPackAttachmentMaxSizeToSettings < ActiveRecord::Migration
+  def up
+    Setting.where(name: 'attachment_max_size').update_all(value: 51200)
+    Setting.create(name: 'pack_attachment_max_size', value: 51200 )
+  end
+
+  def down
+    Setting.delete(name: 'pack_attachment_max_size')
+    Setting.where(name: 'attachment_max_size').update_all(value: 204800)
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index bad1cf2ae..71d91560e 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20150305081132) do
+ActiveRecord::Schema.define(:version => 20150309090143) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false