diff --git a/全自动水压检测仪/Coeffiicientsetting.cs b/全自动水压检测仪/Coeffiicientsetting.cs
index c927e47..0db5b96 100644
--- a/全自动水压检测仪/Coeffiicientsetting.cs
+++ b/全自动水压检测仪/Coeffiicientsetting.cs
@@ -50,13 +50,22 @@ namespace 全自动水压检测仪
             };
             timer.Tick += async (s, e) =>
             {
+                // 检查窗体状态
+                if (this.IsDisposed || !this.IsHandleCreated)
+                {
+                    return;
+                }
+
                 if (!_isManualInput && _modbusMaster != null)
                 {
                     try
                     {
                         await ReadLeakTestParametersAsync();
                     }
-                    catch { }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine($"定时器读取参数异常: {ex.Message}");
+                    }
                 }
             };
 
@@ -292,24 +301,60 @@ namespace 全自动水压检测仪
 
         private void Coeffiicientsetting_FormClosing(object sender, FormClosingEventArgs e)
         {
-            _cts.Cancel();
-            _cts.Dispose();
-
-            // 停止定时器
-            _readTimer?.Stop();
-            _readTimer?.Dispose();
-
-            // 仅用户主动关闭时退出应用
-            if (e.CloseReason == CloseReason.UserClosing)
+            try
             {
-                ModbusResourceManager.Instance?.Dispose();
-                Application.Exit();
+                // 取消异步操作
+                if (_cts != null && !_cts.IsCancellationRequested)
+                {
+                    _cts.Cancel();
+                    _cts.Dispose();
+                    _cts = null;
+                }
+
+                // 停止定时器
+                if (_readTimer != null)
+                {
+                    _readTimer.Stop();
+                    _readTimer.Tick -= null;
+                    _readTimer.Dispose();
+                    _readTimer = null;
+                }
+
+                // 仅用户主动关闭时退出应用
+                if (e.CloseReason == CloseReason.UserClosing)
+                {
+                    try
+                    {
+                        ModbusResourceManager.Instance?.Dispose();
+                    }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine($"释放Modbus资源失败: {ex.Message}");
+                    }
+                    Application.Exit();
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"窗体关闭异常: {ex.Message}");
+                // 确保应用能够退出
+                if (e.CloseReason == CloseReason.UserClosing)
+                {
+                    Application.Exit();
+                }
             }
         }
 
         private void Coeffiicientsetting_FormClosed(object sender, FormClosedEventArgs e)
         {
-            _normalTemperatureMode?.Dispose();
+            try
+            {
+                _normalTemperatureMode?.Dispose();
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"释放主窗体资源失败: {ex.Message}");
+            }
         }
 
 
diff --git a/全自动水压检测仪/DATA/ModbusResourceManager.cs b/全自动水压检测仪/DATA/ModbusResourceManager.cs
index 4d410d9..5189c26 100644
--- a/全自动水压检测仪/DATA/ModbusResourceManager.cs
+++ b/全自动水压检测仪/DATA/ModbusResourceManager.cs
@@ -42,28 +42,64 @@ namespace 全自动水压检测仪.Data
 
         public void Dispose()
         {
-            try
-            {
-                ModbusMaster?.Dispose();
-                TcpClient?.Close();
-            }
-            catch
-            {
-                // 忽略清理时的异常
-            }
+            ReleaseResource();
         }
+
         // 释放资源（统一释放，避免重复关闭）
         public void ReleaseResource()
         {
-            ModbusMaster?.Dispose();
-            ModbusMaster = null;
+            try
+            {
+                // 先释放 ModbusMaster
+                if (ModbusMaster != null)
+                {
+                    try
+                    {
+                        ModbusMaster.Dispose();
+                    }
+                    catch (Exception ex)
+                    {
+                        Console.WriteLine($"释放ModbusMaster失败：{ex.Message}");
+                    }
+                    finally
+                    {
+                        ModbusMaster = null;
+                    }
+                }
 
-            //if (TcpClient?.Connected ?? false)
-            //{
-            //    TcpClient.Close();
-            //}
-            TcpClient?.Dispose();
-            TcpClient = null;
+                // 再释放 TcpClient
+                if (TcpClient != null)
+                {
+                    try
+                    {
+                        if (TcpClient.Connected)
+                        {
+                            TcpClient.Close();
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        Console.WriteLine($"关闭TcpClient失败：{ex.Message}");
+                    }
+
+                    try
+                    {
+                        TcpClient.Dispose();
+                    }
+                    catch (Exception ex)
+                    {
+                        Console.WriteLine($"释放TcpClient失败：{ex.Message}");
+                    }
+                    finally
+                    {
+                        TcpClient = null;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"资源释放异常：{ex.Message}");
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/全自动水压检测仪/NormalTemperatureMode.cs b/全自动水压检测仪/NormalTemperatureMode.cs
index f404d5d..4a175d5 100644
--- a/全自动水压检测仪/NormalTemperatureMode.cs
+++ b/全自动水压检测仪/NormalTemperatureMode.cs
@@ -118,16 +118,19 @@ namespace 全自动水压检测仪
             };
             timer.Tick += async (s, e) =>
             {
-                if (!_isCheckingAlarm && _modbusMaster != null)
+                // 检查窗体和资源状态
+                if (this.IsDisposed || !this.IsHandleCreated || _isCheckingAlarm || _modbusMaster == null)
                 {
-                    try
-                    {
-                        await CheckAlarmStatusAsync();
-                    }
-                    catch (Exception ex)
-                    {
-                        Debug.WriteLine($"报警监控异常: {ex.Message}");
-                    }
+                    return;
+                }
+
+                try
+                {
+                    await CheckAlarmStatusAsync();
+                }
+                catch (Exception ex)
+                {
+                    Debug.WriteLine($"报警监控异常: {ex.Message}");
                 }
             };
             return timer;
@@ -136,7 +139,13 @@ namespace 全自动水压检测仪
 
         private async Task CheckAlarmStatusAsync()
         {
-            if (_isCheckingAlarm || _modbusMaster == null) return;
+            if (_isCheckingAlarm) return;
+
+            // 检查窗体和Modbus连接状态
+            if (this.IsDisposed || !this.IsHandleCreated || _modbusMaster == null)
+            {
+                return;
+            }
 
             _isCheckingAlarm = true;
 
@@ -155,12 +164,31 @@ namespace 全自动水压检测仪
 
                 foreach (var address in alarmAddresses)
                 {
+                    // 每次循环都检查窗体状态
+                    if (this.IsDisposed || !this.IsHandleCreated || _modbusMaster == null)
+                    {
+                        break;
+                    }
+
                     try
                     {
                         bool[] alarmStatus = await Task.Run(() =>
                         {
-                            // 注意：ReadCoils的参数是起始地址和数量
-                            return _modbusMaster.ReadCoils(1, address, 1);
+                            // 再次检查，避免在后台线程中访问已释放的资源
+                            if (_modbusMaster == null)
+                            {
+                                return null;
+                            }
+
+                            try
+                            {
+                                // 注意：ReadCoils的参数是起始地址和数量
+                                return _modbusMaster.ReadCoils(1, address, 1);
+                            }
+                            catch
+                            {
+                                return null;
+                            }
                         });
 
                         if (alarmStatus != null && alarmStatus.Length > 0)
@@ -347,20 +375,16 @@ namespace 全自动水压检测仪
 
         private async Task ReadLeakTestParametersAsync()
         {
-            // 检查连接状态
-            if (_tcpClient == null || !_tcpClient.Connected || _modbusMaster == null)
+            // 检查窗体状态
+            if (this.IsDisposed || !this.IsHandleCreated)
             {
-                SafeInvoke(() =>
-                {
-                    MessageBox.Show("TCP未连接或ModbusMaster未初始化", "提示");
-                });
                 return;
             }
 
-            // 检查UI控件是否可用（避免在窗体释放前调用）
-            if (!this.IsHandleCreated || this.IsDisposed)
+            // 检查连接状态
+            if (_tcpClient == null || !_tcpClient.Connected || _modbusMaster == null)
             {
-                return;
+                return; // 静默返回，不显示消息框
             }
 
             try
@@ -596,6 +620,12 @@ namespace 全自动水压检测仪
 
         private async Task ReadLeakTestParametersAsyncTwo()
         {
+            // 检查窗体状态
+            if (this.IsDisposed || !this.IsHandleCreated)
+            {
+                return;
+            }
+
             //是否连接
             if (_tcpClient == null || !_tcpClient.Connected || _modbusMaster == null) return;
 
@@ -1164,24 +1194,88 @@ namespace 全自动水压检测仪
 
         private void NormalTemperatureMode_FormClosing(object sender, FormClosingEventArgs e)
         {
-            // 停止定时器
-            _readTimer?.Stop();
-            _readTimer?.Dispose();
-            _readTimerTwo?.Stop();
-            _readTimerTwo?.Dispose();
-
-            // 停止报警监控定时器
-            _alarmMonitorTimer?.Stop();
-            _alarmMonitorTimer?.Dispose();
-
-            // 释放图表资源
-            _chartManager?.Dispose();
-
-            // 仅用户主动关闭时退出应用
-            if (e.CloseReason == CloseReason.UserClosing)
+            try
             {
-                ModbusResourceManager.Instance?.Dispose();
-                Application.Exit();
+                // 先停止所有定时器，防止在释放资源时继续触发
+                if (_readTimer != null)
+                {
+                    _readTimer.Stop();
+                    _readTimer.Tick -= null; // 移除事件处理器
+                    _readTimer.Dispose();
+                    _readTimer = null;
+                }
+
+                if (_readTimerTwo != null)
+                {
+                    _readTimerTwo.Stop();
+                    _readTimerTwo.Tick -= null;
+                    _readTimerTwo.Dispose();
+                    _readTimerTwo = null;
+                }
+
+                // 停止报警监控定时器
+                if (_alarmMonitorTimer != null)
+                {
+                    _alarmMonitorTimer.Stop();
+                    _alarmMonitorTimer.Tick -= null;
+                    _alarmMonitorTimer.Dispose();
+                    _alarmMonitorTimer = null;
+                }
+
+                // 等待异步操作完成
+                int waitCount = 0;
+                while (_isCheckingAlarm && waitCount < 10)
+                {
+                    System.Threading.Thread.Sleep(100);
+                    waitCount++;
+                }
+
+                // 释放图表资源
+                try
+                {
+                    _chartManager?.Dispose();
+                    _chartManager = null;
+                }
+                catch (Exception ex)
+                {
+                    Debug.WriteLine($"释放图表资源失败: {ex.Message}");
+                }
+
+                // 释放其他窗体资源
+                try
+                {
+                    _coeffiicientsetting?.Dispose();
+                    _scanImport?.Dispose();
+                    _statusSettingsForm?.Dispose();
+                    _report?.Dispose();
+                }
+                catch (Exception ex)
+                {
+                    Debug.WriteLine($"释放窗体资源失败: {ex.Message}");
+                }
+
+                // 仅用户主动关闭时退出应用
+                if (e.CloseReason == CloseReason.UserClosing)
+                {
+                    try
+                    {
+                        ModbusResourceManager.Instance?.Dispose();
+                    }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine($"释放Modbus资源失败: {ex.Message}");
+                    }
+                    Application.Exit();
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"窗体关闭异常: {ex.Message}");
+                // 确保应用能够退出
+                if (e.CloseReason == CloseReason.UserClosing)
+                {
+                    Application.Exit();
+                }
             }
         }
 
diff --git a/全自动水压检测仪/StatusSettingsForm.cs b/全自动水压检测仪/StatusSettingsForm.cs
index 9e438e6..dc1c47a 100644
--- a/全自动水压检测仪/StatusSettingsForm.cs
+++ b/全自动水压检测仪/StatusSettingsForm.cs
@@ -41,6 +41,12 @@ namespace 全自动水压检测仪
 
         private void UpdateTimer_Tick(object sender, EventArgs e)
         {
+            // 检查窗体状态
+            if (this.IsDisposed || !this.IsHandleCreated)
+            {
+                return;
+            }
+
             try
             {
                 UpdateStatusDisplay();
@@ -111,8 +117,20 @@ namespace 全自动水压检测仪
 
         private void StatusSettingsForm_FormClosing(object sender, FormClosingEventArgs e)
         {
-            _updateTimer?.Stop();
-            _updateTimer?.Dispose();
+            try
+            {
+                if (_updateTimer != null)
+                {
+                    _updateTimer.Stop();
+                    _updateTimer.Tick -= UpdateTimer_Tick;
+                    _updateTimer.Dispose();
+                    _updateTimer = null;
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"释放定时器资源失败: {ex.Message}");
+            }
         }
 
         private void uiButton_Close_Click(object sender, EventArgs e)