diff --git a/src/bind/build/dns-monitor.sh b/src/bind/build/dns-monitor.sh
index 2890b47..12fdb76 100644
--- a/src/bind/build/dns-monitor.sh
+++ b/src/bind/build/dns-monitor.sh
@@ -17,6 +17,9 @@ log_message() {
 
 log_message "DNS监控脚本启动"
 
+log_message "删除DNS备份文件（如果存在）"
+rm -f $DNS_BACKUP
+
 while true; do
     if [ -f "$DNS_CONF" ]; then
         if [ -f "$DNS_BACKUP" ]; then