diff --git a/internal/process/manager.go b/internal/process/manager.go
index 20ba30b..e934ef5 100644
--- a/internal/process/manager.go
+++ b/internal/process/manager.go
@@ -486,6 +486,34 @@ func (pm *ProcessManager) killProcess(pid int) error {
 	return process.Kill()
 }
 
+// killAllFrpc 强制杀死所有 frpc 进程（包括孤儿）
+func (pm *ProcessManager) killAllFrpc() {
+	log.Printf("[INFO] 清理所有 frpc 进程...")
+	if runtime.GOOS == "windows" {
+		exec.Command("taskkill", "/F", "/IM", "frpc.exe").Run()
+	} else {
+		exec.Command("pkill", "-9", "-f", "frpc").Run()
+	}
+	time.Sleep(1 * time.Second)
+	pm.deletePIDFile()
+}
+
+// countFrpcProcesses 统计当前 frpc 进程数量
+func (pm *ProcessManager) countFrpcProcesses() int {
+	if runtime.GOOS == "windows" {
+		cmd := exec.Command("tasklist", "/FI", "IMAGENAME eq frpc.exe")
+		out, _ := cmd.CombinedOutput()
+		return strings.Count(string(out), "frpc.exe")
+	}
+	cmd := exec.Command("pgrep", "-c", "-f", "frpc")
+	out, err := cmd.Output()
+	if err != nil {
+		return 0
+	}
+	count, _ := strconv.Atoi(strings.TrimSpace(string(out)))
+	return count
+}
+
 func (pm *ProcessManager) cleanupOrphans() {
 	result := pm.CheckPort()
 	if !result.Ready {
@@ -619,7 +647,6 @@ func (pm *ProcessManager) computeState(pid int, result PortCheckResult) ProcessS
 	stderr := pm.getLastError()
 	frpReady := pm.isFRPReady(stdout)
 
-	// 获取退出码
 	pm.exitMu.Lock()
 	exitCode := pm.exitCode
 	pm.exitMu.Unlock()
@@ -649,7 +676,6 @@ func (pm *ProcessManager) computeState(pid int, result PortCheckResult) ProcessS
 			return state
 		}
 
-		// 异常退出
 		if exitCode != 0 && exitCode != -1 {
 			state.Error = fmt.Sprintf("进程异常退出 (exit code: %d)", exitCode)
 			if stderr != "" {
@@ -677,6 +703,11 @@ func (pm *ProcessManager) computeState(pid int, result PortCheckResult) ProcessS
 
 	if portReady && frpReady {
 		state.Phase = PhaseRunning
+		// 检测多进程
+		if count := pm.countFrpcProcesses(); count > 1 {
+			state.Phase = PhaseDegraded
+			state.Error = fmt.Sprintf("检测到 %d 个 frpc 进程，可能存在多开", count)
+		}
 		return state
 	}
 
@@ -761,7 +792,12 @@ func (pm *ProcessManager) Start(ctx context.Context) error {
 	}
 	defer pm.Unlock()
 
+	// 先杀所有 frpc 进程（避免多开）
+	pm.killAllFrpc()
+
+	// 清理孤儿
 	pm.cleanupOrphans()
+
 	return pm.startLocked(ctx)
 }
 
@@ -779,7 +815,6 @@ func (pm *ProcessManager) startLocked(ctx context.Context) error {
 	pm.startTime = time.Now()
 	pm.expectedStop = false
 
-	// 重置退出码
 	pm.exitMu.Lock()
 	pm.exitCode = -1
 	pm.exitMu.Unlock()
@@ -847,15 +882,18 @@ func (pm *ProcessManager) startLocked(ctx context.Context) error {
 		time.Sleep(StartupRetryDelay)
 	}
 
+	// 超时：检查进程状态
 	if pm.isProcessAlive(cmd.Process.Pid) {
 		stderr := pm.getLastError()
 		log.Printf("[WARN] frpc 启动超时 (PID: %d)，当前 stderr: %s", cmd.Process.Pid, stderr)
-		// 进程还在但端口没起来，尝试获取 frpc admin API 版本信息
 		if info := pm.getFRPCStatus(cmd.Process.Pid); info != nil && info.Version != "" {
 			log.Printf("[INFO] frpc admin API 可访问，版本: %s", info.Version)
-			// API 可访问说明 frpc 已正常运行，只是端口检测有误
+			pm.writePIDFile(cmd.Process.Pid)
 			return nil
 		}
+		// 启动失败：杀掉进程
+		pm.killProcess(cmd.Process.Pid)
+		pm.deletePIDFile()
 		return fmt.Errorf("frpc 启动超时: 进程存在但端口未就绪")
 	}
 
@@ -957,6 +995,7 @@ func (pm *ProcessManager) HealthCheck() map[string]interface{} {
 
 	result["phase"] = state.Phase
 	result["pid"] = state.PID
+	result["port"] = state.Port
 	result["alive"] = state.Alive
 	result["port_ready"] = state.PortReady
 	result["frp_ready"] = state.FRPReady