diff --git a/app/forms/contents/create_form.rb b/app/forms/contents/create_form.rb
index 71709026d..73341661c 100644
--- a/app/forms/contents/create_form.rb
+++ b/app/forms/contents/create_form.rb
@@ -3,7 +3,7 @@ class Contents::CreateForm < BaseForm
 
   validates :filepath, presence: true
 
-  validates :new_branch, length: { maximum: 50}
+  validates :new_branch, length: { maximum: 50, too_long: "分支名称过长，仅支持%{count}的长度"}
 
   validate :check_branch