diff --git a/monitor-watchdog.sh b/monitor-watchdog.sh
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+++ b/monitor-watchdog.sh
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+#!/usr/bin/env bash
+# monitor-ai 健康检查兜底脚本
+#
+# 用途：当 monitor-ai 自身的健康检查失败时，通过 webhook 直接发送告警
+# 部署：添加到 crontab，每 5 分钟执行一次
+#
+# crontab 配置：
+#   */5 * * * * /root/docker/monitor-ai/scripts/monitor-watchdog.sh >> /var/log/monitor-watchdog.log 2>&1
+#
+# 日志文件：/var/log/monitor-watchdog.log（建议配合 logrotate）
+
+set -euo pipefail
+
+# ============================================================
+# 配置
+# ============================================================
+HEALTH_URL="${MONITOR_HEALTH_URL:-https://monitor.tlyq.ai/api/health}"
+TIMEOUT=10
+MAX_RETRIES=2
+RETRY_DELAY=5
+
+# 企业微信 Webhook（从 .env 读取或使用环境变量）
+MONITOR_DIR="/root/docker/monitor-ai"
+if [[ -f "$MONITOR_DIR/.env" ]]; then
+    # 从 .env 读取第一个启用的 webhook URL
+    WEBHOOK_URL="${WEBHOOK_URL:-$(grep -E '^WEBHOOK_URL=' "$MONITOR_DIR/.env" 2>/dev/null | head -1 | cut -d= -f2-)}"
+fi
+
+# 如果没有配置 webhook，尝试从数据库读取
+if [[ -z "${WEBHOOK_URL:-}" ]]; then
+    DB_PATH="${MONITOR_DIR}/data/monitor.db"
+    if [[ -f "$DB_PATH" ]]; then
+        WEBHOOK_URL=$(sqlite3 "$DB_PATH" "SELECT webhook_url FROM alert_channels WHERE enabled=1 LIMIT 1;" 2>/dev/null || echo "")
+    fi
+fi
+
+# 日志函数
+log() {
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
+}
+
+# ============================================================
+# 健康检查
+# ============================================================
+check_health() {
+    local attempt=0
+    local http_code=""
+
+    while [[ $attempt -lt $MAX_RETRIES ]]; do
+        attempt=$((attempt + 1))
+
+        http_code=$(curl -s -o /dev/null -w '%{http_code}' \
+            --connect-timeout "$TIMEOUT" \
+            --max-time "$TIMEOUT" \
+            "$HEALTH_URL" 2>/dev/null) || http_code="000"
+
+        if [[ "$http_code" == "200" ]]; then
+            return 0
+        fi
+
+        if [[ $attempt -lt $MAX_RETRIES ]]; then
+            log "健康检查失败 (HTTP $http_code)，${RETRY_DELAY}s 后重试..."
+            sleep "$RETRY_DELAY"
+        fi
+    done
+
+    return 1
+}
+
+# ============================================================
+# 发送告警
+# ============================================================
+send_alert() {
+    local message="$1"
+
+    if [[ -z "${WEBHOOK_URL:-}" ]]; then
+        log "WARNING: 未配置企业微信 Webhook URL，无法发送告警"
+        return 1
+    fi
+
+    local payload
+    payload=$(cat <<EOF
+{
+    "msgtype": "markdown",
+    "markdown": {
+        "content": "## ⚠️ monitor-ai 自身异常\n\n> 告警时间: $(date '+%Y-%m-%d %H:%M:%S')\n\n**健康检查地址**: ${HEALTH_URL}\n\n**失败原因**: ${message}\n\n**处理建议**: 请检查 monitor-ai 容器状态\n\n<font color=\"warning\">此告警由 monitor-watchdog 发送</font>"
+    }
+}
+EOF
+)
+
+    local response
+    response=$(curl -s -X POST \
+        --connect-timeout 10 \
+        --max-time 10 \
+        -H "Content-Type: application/json" \
+        -d "$payload" \
+        "$WEBHOOK_URL" 2>&1)
+
+    if [[ $? -eq 0 ]]; then
+        log "告警已发送: $response"
+    else
+        log "WARNING: 告警发送失败: $response"
+        return 1
+    fi
+}
+
+# ============================================================
+# 主逻辑
+# ============================================================
+main() {
+    log "开始健康检查: $HEALTH_URL"
+
+    if check_health; then
+        log "健康检查通过 (HTTP 200)"
+        exit 0
+    fi
+
+    log "ERROR: 健康检查失败，尝试发送告警..."
+    send_alert "HTTP 健康检查失败，连续 ${MAX_RETRIES} 次请求均未返回 200"
+
+    # 检查容器状态
+    local container_status
+    container_status=$(docker inspect -f '{{.State.Status}}' monitor-ai 2>/dev/null || echo "not_found")
+    log "容器状态: $container_status"
+
+    if [[ "$container_status" != "running" ]]; then
+        log "ERROR: 容器未运行，尝试重启..."
+        cd "$MONITOR_DIR" && docker compose up -d 2>&1 | while read -r line; do log "  $line"; done
+
+        # 等待容器启动后再次检查
+        sleep 10
+        if check_health; then
+            log "容器已重启并通过健康检查"
+        else
+            log "ERROR: 重启后健康检查仍然失败，请人工介入"
+            send_alert "容器已重启，但健康检查仍然失败，请人工介入"
+        fi
+    fi
+}
+
+main "$@"