diff --git a/doc/config_CN.md b/doc/config_CN.md
index 71a6933..6527812 100644
--- a/doc/config_CN.md
+++ b/doc/config_CN.md
@@ -151,9 +151,9 @@ predixy扩展了redis中AUTH命令的功能，支持定义多个认证密码，
     Authority {
         Auth [password] {
             Mode read|write|admin
-            [KeyPredix Predix...]
-            [ReadKeyPredix Predix...]
-            [WriteKeyPredix Predix...]
+            [KeyPrefix Prefix...]
+            [ReadKeyPrefix Prefix...]
+            [WriteKeyPrefix Prefix...]
         }...
     }