diff --git a/app/controllers/bids_controller.rb b/app/controllers/bids_controller.rb
index 0c0b71ffa..6a9fb5c29 100644
--- a/app/controllers/bids_controller.rb
+++ b/app/controllers/bids_controller.rb
@@ -7,7 +7,7 @@ class BidsController < ApplicationController
   menu_item :homework_respond, :only => :homework_respond
   menu_item :homework_statistics, :only => :homework_statistics
   #Ended by young
-  before_filter :find_bid, :only => [:show, :show_project, :create,:destroy,:more,:back,:add,:new,:show_results,:set_reward, :add_homework, :fork, :create_fork,
+  before_filter :find_bid, :only => [:show, :show_project, :create,:destroy,:more,:back,:add,:delete,:new,:show_results,:set_reward, :add_homework, :fork, :create_fork,
                 :show_course, :show_bid_project, :show_bid_user, :join_in_contest, :unjoin_in_contest, :new_join,:show_participator, :settings]
   # added by fq
   before_filter :require_login, :only => [:join_in_contest, :unjoin_in_contest]
@@ -500,6 +500,15 @@ class BidsController < ApplicationController
     end
   end
 
+  #删除已提交的项目作业（不删项目）
+  def delete
+    binding_project = params[:binding_project]
+    if BidingProject.delete(binding_project)
+      redirect_to project_for_bid_path
+    else
+      redirect_to 403;
+    end
+  end
   ## 新建留言
   def create
 
diff --git a/app/models/biding_project.rb b/app/models/biding_project.rb
index cc9c1fba2..0b7b3718e 100644
--- a/app/models/biding_project.rb
+++ b/app/models/biding_project.rb
@@ -19,7 +19,7 @@ class BidingProject < ActiveRecord::Base
     self.create(:user_id => User.current.id, :bid_id => bid_id,
                     :project_id => project_id, :description => description)
   end
-  
+
   # used to update the reward ,the value varies from 0,1,2,3,4,5
   # added by william
   def update_reward(which)
diff --git a/app/views/bids/_list_projects.html.erb b/app/views/bids/_list_projects.html.erb
index ecbf5dfc3..e51314c48 100644
--- a/app/views/bids/_list_projects.html.erb
+++ b/app/views/bids/_list_projects.html.erb
@@ -153,7 +153,12 @@
 							<span class="required">迟交</span>
 						<% end %>
 						</td>
-                        <td align="right"><%= link_to image_tag('delete.png') %></td>
+                        <td align="right">
+                          <% if  b_project.user.id == User.current.id || User.current.id == b_project.bid.author.id
+                          %>
+                            <%= link_to image_tag('delete.png'),{ :action => "delete",  :binding_project => b_project}, :confirm => "Are you sure?"  %>
+                          <% end %>
+                        </td>
 					</tr>
 				</table>
 				</td>
diff --git a/config/routes.rb b/config/routes.rb
index 7d7cb2bbf..a856deaf1 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -550,6 +550,7 @@ RedmineApp::Application.routes.draw do
   match 'calls/:id/show_project', :controller => 'bids', :action => 'show_project', :as => 'project_for_bid'
   match 'calls/:id/show_project_homework', :controller => 'bids', :action => 'show_project_homework', :as => 'project_for_bid_homework' # by huang
   match 'calls/:id/add', :controller => 'bids', :action => 'add'
+  match 'calls/:id/delete', :controller => 'bids', :action => 'delete'
   match 'calls/:id/add_homework', :controller => 'bids', :action => 'add_homework', via: :post
   match 'calls/:id/new_submit_homework', to: 'bids#new_submit_homework', via: :get, as: 'new_submit_homework'
   match 'words/add_project_respond', :controller => 'words', :action => 'add_project_respond'