diff --git a/app/src/main/assets/eth.sh b/app/src/main/assets/eth.sh
index 8a5b3f25..a6284e06 100644
--- a/app/src/main/assets/eth.sh
+++ b/app/src/main/assets/eth.sh
@@ -1,5 +1,21 @@
 #!/system/bin/sh
 
+while [ $WAITED -lt $MAX_WAIT ]; do
+  if [ -d "/sys/class/net/eth0" ]; then
+    echo "eth0 found"
+    break
+  fi
+  echo "Wait eth0... ($WAITED/$MAX_WAIT)"
+  sleep 1
+  WAITED=$((WAITED+1))
+done
+
+# 检查eth0是否存在
+if ! [ -d "/sys/class/net/eth0" ]; then
+  echo "Error: eth0 not exists"
+  exit 1
+fi
+
 /system/bin/ip link set eth0 down
 /system/bin/ip addr flush dev eth0
 /system/bin/ip addr add 192.168.68.91/24 broadcast 192.168.68.255 dev eth0