diff --git a/app/models/course_activity.rb b/app/models/course_activity.rb
index cd3234196..e1f9ab9f5 100644
--- a/app/models/course_activity.rb
+++ b/app/models/course_activity.rb
@@ -6,7 +6,7 @@ class CourseActivity < ActiveRecord::Base
   belongs_to :user
   has_many :user_acts, :class_name => 'UserAcivity',:as =>:act
   after_save :add_user_activity, :add_course_activity
-  before_destroy :destroy_user_activity
+  before_destroy :destroy_user_activity, :destroy_org_activity
 
   #在个人动态里面增加当前动态
   def add_user_activity
@@ -55,4 +55,9 @@ class CourseActivity < ActiveRecord::Base
     user_activity = UserActivity.where("act_type = '#{self.course_act_type.to_s}' and act_id = '#{self.course_act_id}'")
     user_activity.destroy_all
   end
+
+  def destroy_org_activity
+    org_activity = OrgActivity.where("org_act_type = '#{self.course_act_type.to_s}' and org_act_id = '#{self.course_act_id}'")
+    org_activity.destroy_all
+  end
 end
diff --git a/app/models/forge_activity.rb b/app/models/forge_activity.rb
index 5005f9eab..bb5f30442 100644
--- a/app/models/forge_activity.rb
+++ b/app/models/forge_activity.rb
@@ -21,7 +21,7 @@ class ForgeActivity < ActiveRecord::Base
   validates :forge_act_type, presence: true
   has_many :user_acts, :class_name => 'UserAcivity',:as =>:act
   after_save :add_user_activity, :add_org_activity
-  before_destroy :destroy_user_activity
+  before_destroy :destroy_user_activity, :destroy_org_activity
 
   #在个人动态里面增加当前动态
   def add_user_activity
@@ -67,7 +67,7 @@ class ForgeActivity < ActiveRecord::Base
   end
 
   def destroy_org_activity
-    org_acts = OrgActivity.where("org_act_type='#{self.forge_act_type.to_s}' and act_id = '#{self.forge_act_id}'")
+    org_acts = OrgActivity.where("org_act_type='#{self.forge_act_type.to_s}' and org_act_id = '#{self.forge_act_id}'")
     org_acts.destroy_all
   end
 end