diff --git a/rules/costomize.txt b/rules/costomize.txt
index f8bf219..4f5f51a 100755
--- a/rules/costomize.txt
+++ b/rules/costomize.txt
@@ -773,6 +773,7 @@ s.hao.360.com
 /dui88/
 /6lugq4fy.com/
 #屏蔽万能高速下载器
+||down.51bigbig.com
 /iwakaka/
 /iwakaka.net.wsglb0.com/
 /iwakaka.net/