diff --git a/app/models/shixun_info.rb b/app/models/shixun_info.rb
index 321b4c44a..7f7aa364e 100644
--- a/app/models/shixun_info.rb
+++ b/app/models/shixun_info.rb
@@ -1,6 +1,7 @@
 class ShixunInfo < ApplicationRecord
   belongs_to :shixun
   validates_uniqueness_of :shixun_id
+  validates_length_of :fork_reason, maximum: 60
   after_commit :create_diff_record
 
   private