diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index 07b2a345c..b820e6d54 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -71,7 +71,7 @@ class Mailer < ActionMailer::Base
     recipients ||= []
     course.student.each do |student|
       user = User.find(student.student_id)
-      @subject = "#{l(:mail_homework)}#{homework_common.name} #{l(:mail_anonymous_comment_open)}"
+      @subject = "#{l(:mail_homework)}#{homework_common.name}  #{l(:mail_anonymous_comment_open)}"
       @token = Token.get_token_from_user(user, 'autologin')
       @anonymous_comment_close_url = url_for(student_work_index_url(:homework => homework_common.id, :token => @token.value))
       @anonymous_comment_close_name = homework_common.name
@@ -255,7 +255,7 @@ class Mailer < ActionMailer::Base
   # 作业截止时间邮件提醒
   def homework_endtime__added(homework_common, user_id)
     user = User.find(user_id)
-    @subject = "#{l(:mail_homework)}#{homework_common.name}#{l(:mail_homework_endtime)} "
+    @subject = "#{l(:mail_homework)}#{homework_common.name} #{l(:mail_homework_endtime)} "
     @token = Token.get_token_from_user(user, 'autologin')
     @homework_endtime_url = url_for(student_work_index_url(:homework => homework_common.id, :token => @token.value))
     @homework_endtime_name = homework_common.name