diff --git a/resources/default_config.toml b/resources/default_config.toml
index 8825899..e5d091c 100644
--- a/resources/default_config.toml
+++ b/resources/default_config.toml
@@ -84,6 +84,11 @@ width_limit_meters = 3.0
   # ZUp: 强制使用 Z-Up 坐标系（Navisworks 默认）
   # YUp: 强制使用 Y-Up 坐标系（常见于 Revit 导出）
   type = "AutoDetect"
+
+[alias_tree]
+  # 别名树完整展示的最大层级深度（0 = 仅根节点）
+  # 默认值 2，即展示根节点 + 两层子节点
+  max_full_display_depth = 2
   
   # 自定义物流类别
   # 用于扩展内置类别，只需填写类别名称
diff --git a/src/Core/Config/ConfigManager.cs b/src/Core/Config/ConfigManager.cs
index 5b04d96..31c7fe1 100644
--- a/src/Core/Config/ConfigManager.cs
+++ b/src/Core/Config/ConfigManager.cs
@@ -492,6 +492,16 @@ namespace NavisworksTransport.Core.Config
                 }
             }
 
+            // 别名树配置（可选）
+            if (model.ContainsKey("alias_tree"))
+            {
+                var aliasTree = model["alias_tree"] as TomlTable;
+                if (aliasTree != null)
+                {
+                    config.AliasTree.MaxFullDisplayDepth = GetIntValueWithDefault(aliasTree, "max_full_display_depth", 2, missingItems);
+                }
+            }
+
             // 加载自定义类别配置（可选）
             if (model.ContainsKey("custom_category"))
             {
@@ -540,6 +550,7 @@ namespace NavisworksTransport.Core.Config
                 Animation = new AnimationConfig(),
                 Logistics = new LogisticsConfig(),
                 CoordinateSystem = new CoordinateSystemConfig(),
+                AliasTree = new AliasTreeConfig(),
                 CustomCategories = new List<CustomCategoryConfigItem>()
             };
         }
@@ -714,6 +725,15 @@ namespace NavisworksTransport.Core.Config
                 }
             }
 
+            if (model.ContainsKey("alias_tree"))
+            {
+                var aliasTree = model["alias_tree"] as TomlTable;
+                if (aliasTree != null && config.AliasTree != null)
+                {
+                    aliasTree["max_full_display_depth"] = config.AliasTree.MaxFullDisplayDepth;
+                }
+            }
+
             // 更新自定义类别配置
             // 注意：由于Tomlyn对数组的处理限制，自定义类别通过专门的API管理
             // 这里不直接操作TOML模型，而是在保存前通过模板合并
diff --git a/src/Core/Config/SystemConfig.cs b/src/Core/Config/SystemConfig.cs
index 1c424f7..7e04533 100644
--- a/src/Core/Config/SystemConfig.cs
+++ b/src/Core/Config/SystemConfig.cs
@@ -43,6 +43,11 @@ namespace NavisworksTransport.Core.Config
         /// </summary>
         public CoordinateSystemConfig CoordinateSystem { get; set; }
 
+        /// <summary>
+        /// 别名树配置
+        /// </summary>
+        public AliasTreeConfig AliasTree { get; set; }
+
         /// <summary>
         /// 自定义类别列表
         /// </summary>
@@ -310,4 +315,15 @@ namespace NavisworksTransport.Core.Config
         public string Type { get; set; } = "AutoDetect";
 
     }
+
+    /// <summary>
+    /// 别名树配置
+    /// </summary>
+    public class AliasTreeConfig
+    {
+        /// <summary>
+        /// 别名树完整展示的最大层级深度（0 = 仅根节点，默认 2）
+        /// </summary>
+        public int MaxFullDisplayDepth { get; set; } = 2;
+    }
 }
diff --git a/src/UI/WPF/Views/AliasTreeControl.xaml.cs b/src/UI/WPF/Views/AliasTreeControl.xaml.cs
index 537c0da..a3a8cf3 100644
--- a/src/UI/WPF/Views/AliasTreeControl.xaml.cs
+++ b/src/UI/WPF/Views/AliasTreeControl.xaml.cs
@@ -1,4 +1,5 @@
 using NavisworksTransport.Core.AliasTree;
+using NavisworksTransport.Core.Config;
 using NavisworksTransport.UI.WPF.ViewModels;
 using NavisworksTransport.Utils;
 using System;
@@ -47,6 +48,12 @@ namespace NavisworksTransport.UI.WPF.Views
         {
             InitializeComponent();
 
+            // 从配置文件读取初始值
+            MaxFullDisplayDepth = ConfigManager.Instance.Current.AliasTree?.MaxFullDisplayDepth ?? 2;
+
+            // 订阅配置变更，实时生效
+            ConfigManager.Instance.CategoryConfigurationChanged += OnAliasTreeConfigChanged;
+
             // 将 AliasTreeView 的 items 源指向根节点集合
             var rootNodes = new System.Collections.ObjectModel.ObservableCollection<AliasNodeViewModel>();
             AliasTreeView.ItemsSource = rootNodes;
@@ -130,11 +137,25 @@ namespace NavisworksTransport.UI.WPF.Views
         /// </summary>
         public void Cleanup()
         {
+            ConfigManager.Instance.CategoryConfigurationChanged -= OnAliasTreeConfigChanged;
             UnhookSelectionEvents();
             _dataStore = null;
             _nodeMap.Clear();
         }
 
+        private void OnAliasTreeConfigChanged(object sender, Tuple<ConfigCategory, ConfigurationChangedEventArgs> args)
+        {
+            var config = ConfigManager.Instance.Current;
+            int newDepth = config.AliasTree?.MaxFullDisplayDepth ?? 2;
+            if (MaxFullDisplayDepth != newDepth)
+            {
+                MaxFullDisplayDepth = newDepth;
+                LogManager.Info($"[别名树] 配置变更: MaxFullDisplayDepth={newDepth}");
+                _built = false;
+                RebuildTree();
+            }
+        }
+
         // ============================================================
         // 选择事件（双向联动）
         // ============================================================