diff --git a/choose-cn.sh b/choose-cn.sh
index 565d7e2..ecfebc9 100644
--- a/choose-cn.sh
+++ b/choose-cn.sh
@@ -36,7 +36,7 @@ do
     echo "Starting download test for $ip"
     # 使用 curl 命令进行下载测试
     start_time=$(date +%s.%N)
-    curl -s --resolve speed.cloudflare.com:443:"$ip" https://speed.cloudflare.com/__down?bytes=10000000 -o /dev/null --connect-timeout 5
+    curl -s --resolve speed.cloudflare.com:443:"$ip" https://speed.cloudflare.com/__down?bytes=10000000 -o /dev/null --connect-timeout 5 --max-time 10
     curl_status=$?
     end_time=$(date +%s.%N)
     elapsed_time=$(echo "$end_time - $start_time" | bc)
@@ -55,6 +55,8 @@ do
         fi
     else
         echo "Download test for $ip failed with status $curl_status"
+        # 从 ip_use.txt 删除下载测试失败的 IP
+        sed -i "/$ip/d" ip_use.txt
     fi
     echo "Finished download test for $ip"
-done < ip_use.txt
\ No newline at end of file
+done < ip_use.txt