diff --git a/src/backend/src/engine/src/main.cpp b/src/backend/src/engine/src/main.cpp
index 15930ff..3bd86e9 100644
--- a/src/backend/src/engine/src/main.cpp
+++ b/src/backend/src/engine/src/main.cpp
@@ -2,7 +2,6 @@
 #include "ipc/shm_mgr.h"
 
 #include "plugin_manage/plugin_host_manager.h"
-#include <filesystem>
 
 #include "misc_type.h"
 #include "ipc/ipc_node.h"
@@ -10,21 +9,10 @@
 
 boost::atomic<heartbeat_t>* engine_heartbeat = nullptr;
 
-void on_engine_exit() {
-	if (engine_heartbeat) {
-		*engine_heartbeat = 0;
-	}
-}
-
 int main(int argc, char *argv[])
 {
-	std::atexit(on_engine_exit);
-	std::at_quick_exit(on_engine_exit);
-
 	shm_mgr::get_instance().init(true);
-	engine_heartbeat = shm_mgr::msg_shm().construct_with_name<boost::atomic<heartbeat_t>>("engine_heartbeat", true);
-	// 初始化心跳
-	*engine_heartbeat = std::chrono::high_resolution_clock::now().time_since_epoch().count();
+	engine_heartbeat = shm_mgr::msg_shm().construct_with_name<boost::atomic<heartbeat_t>>("engine_heartbeat", std::chrono::high_resolution_clock::now().time_since_epoch().count());
 	// 创建一个心跳线程
 	std::thread([]() {
 		while (engine_heartbeat && *engine_heartbeat != 0) {
@@ -34,20 +22,12 @@ int main(int argc, char *argv[])
 	}).detach();
 
 	engine_ipc_node node;
+	auto&           host_manager = plugin_host_manager::get_instance();
 
-	for (int i = 0; i < 20; ++i) {
-		std::filesystem::path path(R"(D:\Projects\Alicho\src\backend\src\vst2_host\test\4Front Piano x64.dll)");
-		plugin_host_manager::get_instance().load_plugin(path);
-	}
-
-	uint32_t times = 0;
 	while (true) {
-		// 模拟主循环
-		std::this_thread::sleep_for(std::chrono::milliseconds(100));
 		node.process_rpc();
-		if (++times > 10) {
-			break; // 运行10次后退出
-		}
+		host_manager.tick();
+		std::this_thread::sleep_for(std::chrono::milliseconds::zero());
 	}
 
 	*engine_heartbeat = 0;
diff --git a/src/backend/src/engine/src/plugin_manage/plugin_host_manager.cpp b/src/backend/src/engine/src/plugin_manage/plugin_host_manager.cpp
index 697f821..f8cbf3e 100644
--- a/src/backend/src/engine/src/plugin_manage/plugin_host_manager.cpp
+++ b/src/backend/src/engine/src/plugin_manage/plugin_host_manager.cpp
@@ -45,6 +45,10 @@ void plugin_host_manager::unload_plugin(uint32_t plugin_id) {
 	}
 }
 
+void plugin_host_manager::tick() {
+
+}
+
 plugin_instance* plugin_host_manager::get_plugin_instance(uint32_t plugin_id) {
 	std::lock_guard lock(mutex_);
 	const auto&     it = plugin_instances_.find(plugin_id);
diff --git a/src/backend/src/engine/src/plugin_manage/plugin_host_manager.h b/src/backend/src/engine/src/plugin_manage/plugin_host_manager.h
index 36cb9d8..c306f20 100644
--- a/src/backend/src/engine/src/plugin_manage/plugin_host_manager.h
+++ b/src/backend/src/engine/src/plugin_manage/plugin_host_manager.h
@@ -11,6 +11,7 @@ public:
 
 	plugin_instance* load_plugin(const std::filesystem::path& plugin_binary_path);
 	void unload_plugin(uint32_t plugin_id);
+	void tick();
 
 	plugin_instance* get_plugin_instance(uint32_t plugin_id);
 
diff --git a/src/backend/src/engine/src/plugin_manage/plugin_instance.cpp b/src/backend/src/engine/src/plugin_manage/plugin_instance.cpp
index b33945d..472e6b6 100644
--- a/src/backend/src/engine/src/plugin_manage/plugin_instance.cpp
+++ b/src/backend/src/engine/src/plugin_manage/plugin_instance.cpp
@@ -61,12 +61,4 @@ plugin_instance::plugin_instance(boost::asio::io_context& ctx,
 	plugin_node_.open_queue(get_plugin_id_name(id));
 }
 
-plugin_instance::~plugin_instance() {
-	// output_queue->push({});
-	// if (input_segment) {
-	// 	bi::shared_memory_object::remove(get_shm_in_name(id).c_str());
-	// }
-	// if (output_segment) {
-	// 	bi::shared_memory_object::remove(get_shm_out_name(id).c_str());
-	// }
-}
+plugin_instance::~plugin_instance() {}
diff --git a/src/backend/src/engine/src/plugin_manage/plugin_instance.h b/src/backend/src/engine/src/plugin_manage/plugin_instance.h
index c0be36d..958b82c 100644
--- a/src/backend/src/engine/src/plugin_manage/plugin_instance.h
+++ b/src/backend/src/engine/src/plugin_manage/plugin_instance.h
@@ -11,15 +11,11 @@ struct plugin_instance {
 	~plugin_instance();
 	uint32_t id = 0;
 
-	// 共享内存资源
 	// std::unique_ptr<boost::interprocess::managed_shared_memory> input_segment;
 	// std::unique_ptr<boost::interprocess::managed_shared_memory> output_segment;
 	// lock_free_queue* input_queue = nullptr; // AudioEngine -> Host
 	// lock_free_queue* output_queue = nullptr; // Host -> AudioEngine
 
-	// 控制连接
-	// std::shared_ptr<rpc_session> session;
-
 	// 状态标识
 	std::atomic_bool is_processing_done{ true }; // 插件是否处理完毕
 	std::atomic_bool is_registered{ false }; // RPC会话是否注册
@@ -35,7 +31,8 @@ struct plugin_instance {
 		}
 		process = nullptr;
 	}
-private:
+
 	plugin_ipc_remote_node plugin_node_;
+private:
 	std::shared_ptr<boost::process::process> process; // 沙箱进程句柄
 };
diff --git a/src/backend/src/misc/src/ipc/ipc_node.h b/src/backend/src/misc/src/ipc/ipc_node.h
index c76ca65..5cdac55 100644
--- a/src/backend/src/misc/src/ipc/ipc_node.h
+++ b/src/backend/src/misc/src/ipc/ipc_node.h
@@ -168,10 +168,12 @@ public:
 	explicit plugin_ipc_node(const std::string& in_queue_name) {
 		engine_queue.open_queue("engine_queue");
 		plugin_queue.create_queue(in_queue_name);
-		engine_running_ = shm_mgr::msg_shm().find<boost::atomic<heartbeat_t>>("engine_heartbeat").first;
-		if (!engine_running_) {
+		engine_heartbeat_ = shm_mgr::msg_shm().find<boost::atomic<heartbeat_t>>("engine_heartbeat").first;
+		if (!engine_heartbeat_) {
 			throw std::runtime_error("无法找到 engine_running 标志");
 		}
+		plugin_heartbeat_ = shm_mgr::msg_shm().construct_with_name<boost::atomic<heartbeat_t>>(in_queue_name + "_heartbeat");
+		*plugin_heartbeat_ = std::chrono::high_resolution_clock::now().time_since_epoch().count();
 	}
 
 	// ------------------- RPC 调用 -------------------
@@ -183,11 +185,11 @@ public:
 
 	[[nodiscard]] auto is_engine_running() const {
 		// 读取引擎心跳
-		const auto& val = engine_running_->load();
+		const auto& val = engine_heartbeat_->load();
 		if (val == 0) {
 			return false; // 引擎已退出
 		}
-		// 心跳阈值 (5 秒)
+		// 心跳阈值 (2 秒)
 		static constexpr auto threshold = std::chrono::seconds(2);
 		// 心跳间隔超过阈值则视为引擎已崩溃
 		const auto duration = std::chrono::high_resolution_clock::now().time_since_epoch() - heartbeat_duration_t(val);
@@ -196,7 +198,8 @@ public:
 private:
 	ipc_node            engine_queue; // 指向引擎主队列（只写）
 	ipc_node            plugin_queue; // 插件自队列（只读）
-	boost::atomic<heartbeat_t>* engine_running_;
+	boost::atomic<heartbeat_t>* engine_heartbeat_;
+	boost::atomic<heartbeat_t>* plugin_heartbeat_;
 };
 
 /**
@@ -210,7 +213,24 @@ public:
 
 	void open_queue(const std::string& in_queue_name) {
 		plugin_queue.open_queue(in_queue_name);
+		plugin_heartbeat_ = shm_mgr::msg_shm().find<boost::atomic<heartbeat_t>>(in_queue_name + "_heartbeat").first;
+	}
+
+	[[nodiscard]] auto is_timeout(int32_t in_seconds) const {
+		if (!plugin_heartbeat_) {
+			return true;
+		}
+		const auto& val = plugin_heartbeat_->load();
+		if (val == 0) {
+			return true; // 插件已退出
+		}
+		// 心跳阈值 (5 秒)
+		static constexpr auto threshold = std::chrono::seconds(in_seconds);
+		// 心跳间隔超过阈值则视为插件已超时
+		const auto duration = std::chrono::high_resolution_clock::now().time_since_epoch() - heartbeat_duration_t(val);
+		return duration >= threshold;
 	}
 private:
 	ipc_node plugin_queue{};
+	boost::atomic<heartbeat_t>* plugin_heartbeat_ = nullptr;
 };
diff --git a/src/backend/src/vst2_host/src/main.cpp b/src/backend/src/vst2_host/src/main.cpp
index 864f0e3..40521d5 100644
--- a/src/backend/src/vst2_host/src/main.cpp
+++ b/src/backend/src/vst2_host/src/main.cpp
@@ -19,14 +19,6 @@ int main(int argc, char *argv[])
 	shm_mgr::get_instance().init();
 
 	plugin_ipc_node node(argv[1]);
-	{
-		for (int i = 0; i < argc; ++i) {
-			const auto& proxy = node.call_rpc<engine_rpc::log>();
-			proxy->set_str(argv[i]);
-			proxy->set_level(spdlog::level::info);
-			proxy.submit();
-		}
-	}
 
 	while (true) {
 		if (!node.is_engine_running())