diff --git a/DeviceEditModule/ViewModels/DialogMangerViewModel.cs b/DeviceEditModule/ViewModels/DialogMangerViewModel.cs
index 1d29cdd..eab5e53 100644
--- a/DeviceEditModule/ViewModels/DialogMangerViewModel.cs
+++ b/DeviceEditModule/ViewModels/DialogMangerViewModel.cs
@@ -27,7 +27,7 @@ namespace DeviceEditModule.ViewModels
         /// <summary>所有 Tab 项集合，绑定到标签条的 ItemsControl。</summary>
         public ObservableCollection<DialogTabItemVM> TagItems { get; } = new();
 
-        /// <summary>以 Tab 标题为 key 追踪已打开的 Tab，防止重复打开。</summary>
+        /// <summary>以设备指纹为 key 追踪已打开的 Tab，防止同一物理设备重复打开。</summary>
         private readonly Dictionary<string, DialogTabItemVM> _tabDictionary = new();
 
         private DialogTabItemVM? _selectedTag;
@@ -87,11 +87,11 @@ namespace DeviceEditModule.ViewModels
 
         #region Tab 管理
 
-        /// <summary>收到事件：若 Tab 已存在则激活，否则创建并追加到集合。</summary>
+        /// <summary>收到事件：若指纹已存在则激活，否则创建并追加到集合。</summary>
         private void OnAddTab(DialogTabInfo info)
         {
-            // 已有相同标题的 Tab → 直接激活，不重复创建
-            if (_tabDictionary.TryGetValue(info.Title, out var existing))
+            // 已有相同指纹的 Tab → 直接激活，不重复创建
+            if (!string.IsNullOrEmpty(info.Fingerprint) && _tabDictionary.TryGetValue(info.Fingerprint, out var existing))
             {
                 ActivateTab(existing);
                 return;
@@ -99,11 +99,14 @@ namespace DeviceEditModule.ViewModels
 
             var tab = new DialogTabItemVM(OnSelectTab, OnCloseTab)
             {
-                Title   = info.Title,
-                Content = info.Content
+                Title      = info.Title,
+                Fingerprint = info.Fingerprint,
+                Content    = info.Content
             };
 
-            _tabDictionary[info.Title] = tab;
+            if (!string.IsNullOrEmpty(info.Fingerprint))
+                _tabDictionary[info.Fingerprint] = tab;
+
             TagItems.Add(tab);
             RaisePropertyChanged(nameof(HasNoTabs));
             ActivateTab(tab);
@@ -116,7 +119,8 @@ namespace DeviceEditModule.ViewModels
         private void OnCloseTab(DialogTabItemVM tab)
         {
             int idx = TagItems.IndexOf(tab);
-            _tabDictionary.Remove(tab.Title);
+            if (!string.IsNullOrEmpty(tab.Fingerprint))
+                _tabDictionary.Remove(tab.Fingerprint);
             TagItems.Remove(tab);
             RaisePropertyChanged(nameof(HasNoTabs));
 
diff --git a/TestingModule/ViewModels/ParametersManagerViewModel.cs b/TestingModule/ViewModels/ParametersManagerViewModel.cs
index f5cf47a..7f7f61d 100644
--- a/TestingModule/ViewModels/ParametersManagerViewModel.cs
+++ b/TestingModule/ViewModels/ParametersManagerViewModel.cs
@@ -147,11 +147,14 @@ namespace TestingModule.ViewModels
                 }
 
                 // 4. 发布事件 → DialogMangerViewModel 接收后将此 View 添加为 Tab
-                //    标题格式：{当前作用域} - {设备名称}，作为全局唯一 Tab 标识
+                //    标题格式：{当前作用域} - {设备名称}
+                //    去重依据：设备硬件指纹（同一物理设备不重复打开）
+                var fingerprint = DeviceManager.ExtractHardwareFingerprint(SelectedDevice);
                 _eventAggregator.GetEvent<AddDialogTabEvent>().Publish(new DialogTabInfo
                 {
-                    Title   = $"{_globalInfo.CurrentScope} - {SelectedDevice.DeviceName}",
-                    Content = view
+                    Title       = $"{_globalInfo.CurrentScope} - {SelectedDevice.DeviceName}",
+                    Fingerprint = fingerprint,
+                    Content     = view
                 });
 
                 // 5. 将窗口置顶（确保用户看到新增的 Tab）
diff --git a/UIShare/GlobalVariable/DeviceManager.cs b/UIShare/GlobalVariable/DeviceManager.cs
index 3202aa8..2a9fa7e 100644
--- a/UIShare/GlobalVariable/DeviceManager.cs
+++ b/UIShare/GlobalVariable/DeviceManager.cs
@@ -38,7 +38,7 @@ namespace UIShare.GlobalVariable
         /// 根据设备配置提取唯一的硬件指纹字符串。
         /// <para>Tcp → "Tcp:IP:Port"；Serial → "Serial:PortName"；无法识别则返回空字符串。</para>
         /// </summary>
-        private static string ExtractHardwareFingerprint(DeviceInfoVM config)
+        public static string ExtractHardwareFingerprint(DeviceInfoVM config)
         {
             if (string.Equals(config.ConnectionType, "Tcp", StringComparison.OrdinalIgnoreCase)
                 && config.TcpConfig != null)
diff --git a/UIShare/UIViewModel/DialogTabInfo.cs b/UIShare/UIViewModel/DialogTabInfo.cs
index d8b5e5b..1ef06b4 100644
--- a/UIShare/UIViewModel/DialogTabInfo.cs
+++ b/UIShare/UIViewModel/DialogTabInfo.cs
@@ -10,6 +10,12 @@ namespace UIShare.UIViewModel
         /// <summary>Tab 标题（显示在标签页上）。</summary>
         public string Title { get; set; } = string.Empty;
 
+        /// <summary>
+        /// 设备硬件指纹（如 "Tcp:192.168.1.100:502"），用于去重判断，
+        /// 防止同一物理设备被重复打开多个 Tab。
+        /// </summary>
+        public string Fingerprint { get; set; } = string.Empty;
+
         /// <summary>
         /// Tab 内容：传入一个已实例化的 <see cref="System.Windows.FrameworkElement"/>（通常是 UserControl），
         /// 由 ContentControl 直接承载展示。
diff --git a/UIShare/UIViewModel/DialogTabItemVM.cs b/UIShare/UIViewModel/DialogTabItemVM.cs
index ff86357..b09fc32 100644
--- a/UIShare/UIViewModel/DialogTabItemVM.cs
+++ b/UIShare/UIViewModel/DialogTabItemVM.cs
@@ -21,6 +21,14 @@ namespace DeviceEditModule.ViewModels
             set => SetProperty(ref _title, value);
         }
 
+        private string _fingerprint = string.Empty;
+        /// <summary>设备硬件指纹，用于去重字典的 Key。</summary>
+        public string Fingerprint
+        {
+            get => _fingerprint;
+            set => SetProperty(ref _fingerprint, value);
+        }
+
         private object? _content;
         /// <summary>Tab 内容区域（通常为 UserControl 实例）。</summary>
         public object? Content