diff --git a/app/controllers/graduation_topics_controller.rb b/app/controllers/graduation_topics_controller.rb
index a6903dbc7..ce4488ffd 100644
--- a/app/controllers/graduation_topics_controller.rb
+++ b/app/controllers/graduation_topics_controller.rb
@@ -223,7 +223,7 @@ class GraduationTopicsController < ApplicationController
 
           # 已加入的更新，未加入的新建
           if topic_bank.present?
-            topic_bank.update_attributes(name: topic, description: topic.description,
+            topic_bank.update_attributes(name: topic.name, description: topic.description,
                                          topic_source: topic.topic_source,
                                          topic_property_first: topic.topic_property_first,
                                          topic_property_second: topic.topic_property_second,
@@ -234,7 +234,7 @@ class GraduationTopicsController < ApplicationController
                                          course_list_id:  @course.course_list_id)
             topic_bank.attachments.destroy_all
           else
-            topic_bank = GtopicBank.new(name: topic, description: topic.description,
+            topic_bank = GtopicBank.new(name: topic.name, description: topic.description,
                                         topic_source: topic.topic_source,
                                         topic_property_first: topic.topic_property_first,
                                         topic_property_second: topic.topic_property_second,