diff --git a/app/admin/model/SystemTimerConfig.php b/app/admin/model/SystemTimerConfig.php
new file mode 100644
index 0000000..c32d62a
--- /dev/null
+++ b/app/admin/model/SystemTimerConfig.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace app\admin\model;
+
+use think\Model;
+
+class SystemTimerConfig extends Model
+{
+    protected $name = 'system_timer_config';
+
+    protected $autoWriteTimestamp = true;
+}
diff --git a/extend/base/admin/model/SystemHostBase.php b/extend/base/admin/model/SystemHostBase.php
index 4cc7a36..e2d941a 100644
--- a/extend/base/admin/model/SystemHostBase.php
+++ b/extend/base/admin/model/SystemHostBase.php
@@ -9,6 +9,7 @@ use app\common\model\TimeModel;
  * @property string $node_id 节点ID
  * @property string $ip_address IP地址
  * @property int $status 状态 0:离线,1:在线
+ * @property int $is_master 是否主节点 0:否,1:是
  * @property string $last_heartbeat_at 最后心跳时间
  * @property string $os_info 系统信息
  * @property string $php_version PHP版本
diff --git a/extend/base/common/command/TimerBase.php b/extend/base/common/command/TimerBase.php
index ddb599b..c7044d5 100644
--- a/extend/base/common/command/TimerBase.php
+++ b/extend/base/common/command/TimerBase.php
@@ -63,6 +63,9 @@ class TimerBase extends Command
             $output->writeln('站点域名：' . $host);
             $site_host = parse_url($host, PHP_URL_HOST);
 
+            // 同步配置到数据库
+            TimerService::syncConfigToDatabase();
+
             // 设置配置的任务
             $timer_service = new TimerService();
             $request_list = $timer_service->generateAllRequestList();
diff --git a/extend/base/common/service/HostServiceBase.php b/extend/base/common/service/HostServiceBase.php
index 4dc9ad9..1d5c807 100644
--- a/extend/base/common/service/HostServiceBase.php
+++ b/extend/base/common/service/HostServiceBase.php
@@ -75,6 +75,23 @@ class HostServiceBase
             }
 
             $host->save($data);
+
+            // 主节点自动选举：若无在线主节点，当前节点自动成为主节点
+            $master = SystemHost::where('is_master', 1)->where('status', 1)->find();
+            if (empty($master)) {
+                $host->is_master = 1;
+                $host->save();
+                Log::info("节点 [{$nodeId}] 自动当选为主节点。");
+            }
+
+            // 过期节点检测：超过90秒无心跳的节点标记为离线
+            $staleTime = date('Y-m-d H:i:s', time() - 90);
+            $staleCount = SystemHost::where('status', 1)
+                ->where('last_heartbeat_at', '<', $staleTime)
+                ->update(['status' => 0]);
+            if ($staleCount > 0) {
+                Log::info("已将 {$staleCount} 个过期节点标记为离线。");
+            }
         } catch (\Exception $e) {
             throw $e;
             Log::error("节点 [{$nodeId}] 心跳更新失败: " . $e->getMessage());
@@ -110,4 +127,38 @@ class HostServiceBase
             'php_version' => PHP_VERSION,
         ];
     }
+
+    /**
+     * 获取当前主节点的node_id.
+     *
+     * @return string|null 返回主节点ID，无主节点时返回null
+     */
+    public static function getMasterNode(): ?string
+    {
+        $master = SystemHost::where('is_master', 1)->where('status', 1)->find();
+        return $master ? $master->node_id : null;
+    }
+
+    /**
+     * 手动切换主节点.
+     *
+     * @param string $nodeId 目标节点的node_id
+     * @return bool 切换成功返回true，节点不存在返回false
+     */
+    public static function setMasterNode(string $nodeId): bool
+    {
+        // 先清除所有主节点标记
+        SystemHost::where('is_master', 1)->update(['is_master' => 0]);
+
+        // 设置新主节点
+        $host = SystemHost::where('node_id', $nodeId)->find();
+        if ($host) {
+            $host->is_master = 1;
+            $host->save();
+
+            return true;
+        }
+
+        return false;
+    }
 }
diff --git a/extend/base/common/service/TimerServiceBase.php b/extend/base/common/service/TimerServiceBase.php
index e553b27..1bc7a23 100644
--- a/extend/base/common/service/TimerServiceBase.php
+++ b/extend/base/common/service/TimerServiceBase.php
@@ -2,12 +2,69 @@
 
 namespace base\common\service;
 
+use app\admin\model\SystemTimerConfig;
 use app\common\model\VirtualModel;
 
 class TimerServiceBase
 {
     protected $taskList = null;
 
+    /**
+     * 将配置文件中的定时任务同步到数据库.
+     * 仅新增不存在的记录，标记孤立记录，不覆盖 run_type/status.
+     */
+    public static function syncConfigToDatabase(): void
+    {
+        $config_list = include app_file_path('common/command/timer/config.php');
+
+        // 提取唯一的任务名称（并发扩展会产生同名配置，需去重）
+        $config_names = [];
+        foreach ($config_list as $config_item) {
+            $item = static::initConfigItem($config_item);
+            $name = (string) $item['name'];
+            if ($name !== '' && !in_array($name, $config_names, true)) {
+                $config_names[] = $name;
+            }
+        }
+
+        // 查询已有记录
+        $existing = SystemTimerConfig::column('task_name');
+        $now = time();
+
+        // 新增：配置中有但数据库中没有的
+        $new_names = array_diff($config_names, $existing);
+        foreach ($new_names as $name) {
+            SystemTimerConfig::create([
+                'task_name' => $name,
+                'run_type' => 'auto',
+                'status' => 1,
+                'is_synced' => 1,
+                'create_time' => $now,
+                'update_time' => $now,
+            ]);
+        }
+
+        // 已存在且仍在配置中：仅更新 is_synced=1，不动 run_type/status
+        $still_exists = array_intersect($existing, $config_names);
+        foreach ($still_exists as $name) {
+            SystemTimerConfig::where('task_name', $name)
+                ->update([
+                    'is_synced' => 1,
+                    'update_time' => $now,
+                ]);
+        }
+
+        // 已存在但不在配置中：标记为孤立
+        $orphaned = array_diff($existing, $config_names);
+        foreach ($orphaned as $name) {
+            SystemTimerConfig::where('task_name', $name)
+                ->update([
+                    'is_synced' => 0,
+                    'update_time' => $now,
+                ]);
+        }
+    }
+
     public static function generateAllTaskInstanceList()
     {
         $config_list = include app_file_path('common/command/timer/config.php');