diff --git a/app/models/course.rb b/app/models/course.rb
index 682f73958..9100f8470 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -81,7 +81,7 @@ class Course < ApplicationRecord
   # 老版的members弃用  现用course_members
   has_many :members
 
-  validate_harmonious_of [:name, :subject]
+  validate :validate_sensitive_string
 
   scope :hidden,      ->(is_hidden = true) { where(is_hidden: is_hidden) }
   scope :ended,       ->(is_end = true) { where(is_end: is_end) }
@@ -437,4 +437,8 @@ class Course < ApplicationRecord
 
     self.laboratory = Laboratory.current if laboratory_id.blank?
   end
+
+  def validate_sensitive_string
+    raise("课堂名称包含敏感词汇，请重新输入") unless HarmoniousDictionary.clean?(name)
+  end
 end
diff --git a/app/models/course_list.rb b/app/models/course_list.rb
index 84f18f0ef..ab7404a9e 100644
--- a/app/models/course_list.rb
+++ b/app/models/course_list.rb
@@ -7,5 +7,9 @@ class CourseList < ApplicationRecord
   has_many :gtopic_banks
   belongs_to :user
 
-  validate_harmonious_of :name
+  validate :validate_sensitive_string
+
+  def validate_sensitive_string
+    raise("课程名称包含敏感词汇，请重新输入") unless HarmoniousDictionary.clean?(name)
+  end
 end
diff --git a/app/models/memo.rb b/app/models/memo.rb
index 6b7da3548..d79081350 100644
--- a/app/models/memo.rb
+++ b/app/models/memo.rb
@@ -16,7 +16,6 @@ class Memo < ApplicationRecord
   has_many :children, foreign_key: :parent_id, class_name: 'Memo'
   has_many :attachments, as: :container, dependent: :destroy
   has_many :tidings, as: :container, dependent: :destroy
-  validate_harmonious_of [:subject, :content]
   validate :validate_sensitive_string
 
   scope :field_for_list, lambda{