diff --git a/db/migrate/20151218022014_batch_delete_project_journal_activities.rb b/db/migrate/20151218022014_batch_delete_project_journal_activities.rb
index 95d6a39c5..6752b5b30 100644
--- a/db/migrate/20151218022014_batch_delete_project_journal_activities.rb
+++ b/db/migrate/20151218022014_batch_delete_project_journal_activities.rb
@@ -1,7 +1,15 @@
 # encoding: utf-8
 class BatchDeleteProjectJournalActivities < ActiveRecord::Migration
   def up
-    ForgeActivity.where('forge_act_type = \'Journal\'').destroy_all  #需要触发回调
+    #ForgeActivity.where('forge_act_type = \'Journal\'').destroy_all  #需要触发回调
+    count = ForgeActivity.where('forge_act_type = \'Journal\'').count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+        ForgeActivity.where('forge_act_type = \'Journal\'').page(i).per(30).each do |activity|
+            activity.destroy
+        end
+      end
+    end
   end
 
   def down