diff --git a/ydns_update.sh b/ydns_update.sh
new file mode 100644
index 0000000..48e1840
--- /dev/null
+++ b/ydns_update.sh
@@ -0,0 +1,121 @@
+#!/bin/sh
+## name: ydns IP更新
+## cron: */5 * * * *
+
+# 环境变量：YDNS_CONFIG
+# 格式：域名|用户名|密码|记录类型
+# 举例：
+#   只更新IPv4：abc.ydns.eu|123456@qq.com|a123456|A
+#   只更新IPv6：abc.ydns.eu|123456@qq.com|a123456|AAAA
+#   同时更新v4/v6：abc.ydns.eu|123456@qq.com|a123456|A&AAAA
+
+CONFIG="${YDNS_CONFIG:-}"
+
+if [ -z "$CONFIG" ]; then
+    echo "❌ 缺少环境变量 YDNS_CONFIG，格式应为：域名|用户名|密码|记录类型(A/AAAA/A&AAAA)"
+    exit 1
+fi
+
+# 分割配置
+YDNS_HOST=$(echo "$CONFIG" | cut -d '|' -f1)
+YDNS_USER=$(echo "$CONFIG" | cut -d '|' -f2)
+YDNS_PASS=$(echo "$CONFIG" | cut -d '|' -f3)
+IP_TYPE=$(echo "$CONFIG" | cut -d '|' -f4)
+
+if [ -z "$YDNS_HOST" ] || [ -z "$YDNS_USER" ] || [ -z "$YDNS_PASS" ] || [ -z "$IP_TYPE" ]; then
+    echo "❌ YDNS_CONFIG 格式错误，应为：域名|用户名|密码|记录类型(A/AAAA/A&AAAA)"
+    exit 1
+fi
+
+# API
+IPV4_API="http://members.3322.org/dyndns/getip"
+IPV6_API="https://api64.ipify.org"   # 获取IPv6
+
+# 上次IP记录文件路径
+IPV4_FILE="/ql/data/scripts/hlt1995_qlScript/ydns_last_ipv4.txt"
+IPV6_FILE="/ql/data/scripts/hlt1995_qlScript/ydns_last_ipv6.txt"
+
+DEBUG="${DEBUG:-false}"
+LOG="/dev/null"
+
+# 获取 IP
+get_ipv4() { curl -4 -s "$IPV4_API" 2>/dev/null; }
+get_ipv6() { curl -6 -s "$IPV6_API" 2>/dev/null; }
+
+# 文件读写
+get_last_ip() { [ -f "$1" ] && cat "$1" || echo ""; }
+save_ip() { echo "$2" > "$1"; }
+
+# 更新 YDNS
+update_ydns() {
+    local ip="$1"
+    local url="https://ydns.io/api/v1/update/?host=${YDNS_HOST}&ip=${ip}"
+    echo "请求URL: $url" | tee -a "$LOG"
+
+    local response=$(curl -s -u "${YDNS_USER}:${YDNS_PASS}" "$url")
+    echo "原始响应: $response" | tee -a "$LOG"
+
+    if echo "$response" | grep -q -E "ok|good|nochg"; then
+        echo "✅ 更新成功！响应: ${response}" | tee -a "$LOG"
+        return 0
+    else
+        echo "❌ 更新失败或响应异常：${response}" >&2 | tee -a "$LOG"
+        return 1
+    fi
+}
+
+# 更新逻辑
+update_ip() {
+    local type="$1"
+    local current_ip last_ip file label
+
+    if [ "$type" = "A" ]; then
+        current_ip=$(get_ipv4)
+        file="$IPV4_FILE"
+        label="IPv4"
+    else
+        current_ip=$(get_ipv6)
+        file="$IPV6_FILE"
+        label="IPv6"
+    fi
+
+    last_ip=$(get_last_ip "$file")
+
+    if [ -z "$current_ip" ]; then
+        echo "❌ 无法获取公网${label}地址" >&2 | tee -a "$LOG"
+        return
+    fi
+
+    echo "${label} 当前: $current_ip" | tee -a "$LOG"
+    echo "${label} 上次: $last_ip" | tee -a "$LOG"
+
+    if [ "$current_ip" = "$last_ip" ]; then
+        echo "ℹ️ ${label} 未变化，跳过更新" | tee -a "$LOG"
+    else
+        echo "🔄 ${label} 已变化，开始更新..." | tee -a "$LOG"
+        if update_ydns "$current_ip"; then
+            save_ip "$file" "$current_ip"
+            echo "📌 已保存${label}: $current_ip" | tee -a "$LOG"
+        fi
+    fi
+}
+
+# 主流程
+main() {
+    [ "$DEBUG" = "true" ] && set -x
+
+    echo "===== YDNS DDNS 更新启动 =====" | tee -a "$LOG"
+    echo "域名: ${YDNS_HOST}" | tee -a "$LOG"
+    echo "更新类型: ${IP_TYPE}" | tee -a "$LOG"
+
+    case "$IP_TYPE" in
+        A)        update_ip A ;;
+        AAAA)     update_ip AAAA ;;
+        "A&AAAA") update_ip A; update_ip AAAA ;;
+        *)        echo "❌ 记录类型无效，应为 A / AAAA / A&AAAA" ;;
+    esac
+
+    echo "===== 更新完成 =====" | tee -a "$LOG"
+}
+
+main