diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 3088714ee..2c99b6870 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -90,7 +90,7 @@ class Attachment < ActiveRecord::Base
   before_save :files_to_final_location,:act_as_course_activity
   after_create :office_conver, :be_user_score,:act_as_forge_activity,:create_attachment_ealasticsearch_index
   after_update :office_conver, :be_user_score,:update_attachment_ealasticsearch_index
-  after_destroy :delete_from_disk,:down_user_score,:delete_attachment_ealasticsearch_index#, :decrease_attchments_count
+  after_destroy :delete_from_disk,:down_user_score,:delete_attachment_ealasticsearch_index, :decrease_attchments_count
 
   # add by nwb
   # 获取所有可公开的资源文件列表
@@ -641,12 +641,12 @@ class Attachment < ActiveRecord::Base
     end
   end
 
-  # def decrease_attchments_count
-  #   if self.container_type == "Project"
-  #     count = self.container.attachments_count
-  #     #self.container.update_attribute(:attachments_count, self.container.attachments_count - 1)
-  #   end
-  # end
+  def decrease_attchments_count
+    if self.container_type == "Project" && !self.project.project_score.nil?
+      aatach_count = self.container.project_score.attach_num - 1+
+      self.container.project_score.update_attribute(:attach_num, aatach_count)
+    end
+  end
 end
 
 # Delete the previous articles index in Elasticsearch