diff --git a/NavisworksTransport.UnitTests.csproj b/NavisworksTransport.UnitTests.csproj
index ec90fa9..6de6ee0 100644
--- a/NavisworksTransport.UnitTests.csproj
+++ b/NavisworksTransport.UnitTests.csproj
@@ -57,6 +57,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="UnitTests\Core\PathHelperTests.cs" />
+    <Compile Include="UnitTests\Core\SelectionClipBoxLockStateTests.cs" />
     <Compile Include="UnitTests\Core\PathPlanningManagerHoistingCompletionTests.cs" />
     <Compile Include="UnitTests\Core\PathPersistenceTests.cs" />
     <Compile Include="UnitTests\Core\PathRouteCloneTests.cs" />
diff --git a/TransportPlugin.csproj b/TransportPlugin.csproj
index 4b86f88..8912ebe 100644
--- a/TransportPlugin.csproj
+++ b/TransportPlugin.csproj
@@ -372,6 +372,7 @@
     <Compile Include="src\Utils\VisibilityHelper.cs" />
     <Compile Include="src\Utils\NwdExportHelper.cs" />
     <Compile Include="src\Utils\ModelItemTransformHelper.cs" />
+    <Compile Include="src\Utils\SelectionClipBoxLockState.cs" />
     <Compile Include="src\Utils\CachedTriangle3D.cs" />
     <Compile Include="src\Utils\ClipboardHelper.cs" />
     <Compile Include="src\Utils\PathHelper.cs" />
diff --git a/UnitTests/Core/SelectionClipBoxLockStateTests.cs b/UnitTests/Core/SelectionClipBoxLockStateTests.cs
new file mode 100644
index 0000000..c4a5a23
--- /dev/null
+++ b/UnitTests/Core/SelectionClipBoxLockStateTests.cs
@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using NavisworksTransport.Utils;
+
+namespace NavisworksTransport.UnitTests.Core
+{
+    [TestClass]
+    public class SelectionClipBoxLockStateTests
+    {
+        [TestMethod]
+        public void ShouldRefreshOnSelectionChanged_ReturnsFalse_WhenSelectionClipBoxIsLocked()
+        {
+            var state = new SelectionClipBoxLockState();
+            state.LockSelection(new object[] { new object(), new object() });
+
+            bool shouldRefresh = state.ShouldRefreshOnSelectionChanged(isSelectionClipBoxMode: true);
+
+            Assert.IsFalse(shouldRefresh);
+            Assert.AreEqual(2, state.LockedSelectionCount);
+        }
+
+        [TestMethod]
+        public void ShouldRefreshOnSelectionChanged_ReturnsTrue_WhenSelectionClipBoxModeHasNoLockedSelection()
+        {
+            var state = new SelectionClipBoxLockState();
+
+            bool shouldRefresh = state.ShouldRefreshOnSelectionChanged(isSelectionClipBoxMode: true);
+
+            Assert.IsTrue(shouldRefresh);
+            Assert.AreEqual(0, state.LockedSelectionCount);
+        }
+
+        [TestMethod]
+        public void Clear_UnlocksSelectionClipBoxState()
+        {
+            var state = new SelectionClipBoxLockState();
+            state.LockSelection(new List<object> { new object() });
+
+            state.Clear();
+
+            Assert.IsFalse(state.IsLocked);
+            Assert.AreEqual(0, state.LockedSelectionCount);
+        }
+    }
+}
diff --git a/src/UI/WPF/ViewModels/LogisticsControlViewModel.cs b/src/UI/WPF/ViewModels/LogisticsControlViewModel.cs
index 29ff351..182f913 100644
--- a/src/UI/WPF/ViewModels/LogisticsControlViewModel.cs
+++ b/src/UI/WPF/ViewModels/LogisticsControlViewModel.cs
@@ -154,6 +154,7 @@ namespace NavisworksTransport.UI.WPF.ViewModels
         private bool _isSelectionClipBoxEnabled;
         private bool _isUpdatingClipBoxState;
         private ClipBoxFocusMode _clipBoxFocusMode = ClipBoxFocusMode.None;
+        private readonly SelectionClipBoxLockState _selectionClipBoxLockState = new SelectionClipBoxLockState();
 
         /// <summary>
         /// 是否启用剖面盒（聚焦当前路径）
@@ -394,6 +395,7 @@ namespace NavisworksTransport.UI.WPF.ViewModels
         private void ClearActiveClipBox()
         {
             SetClipBoxState(ClipBoxFocusMode.None);
+            _selectionClipBoxLockState.Clear();
             SectionClipHelper.ClearClipBox();
             LogManager.Info("[剖面盒] 已关闭");
         }
@@ -432,6 +434,12 @@ namespace NavisworksTransport.UI.WPF.ViewModels
                 return;
             }
 
+            if (!_selectionClipBoxLockState.ShouldRefreshOnSelectionChanged(isSelectionClipBoxMode: true))
+            {
+                LogManager.Info($"[剖面盒] 选择已变化，但当前剖面盒保持锁定，锁定对象数: {_selectionClipBoxLockState.LockedSelectionCount}");
+                return;
+            }
+
             LogManager.Info("[剖面盒] 选择已变化，重新聚焦到当前选择对象");
             EnableClipBoxForCurrentSelection();
         }
@@ -518,11 +526,13 @@ namespace NavisworksTransport.UI.WPF.ViewModels
                 if (selectedItems == null || selectedItems.Count == 0)
                 {
                     LogManager.Warning("[剖面盒] 当前没有选中的模型对象，无法设置剖面盒");
+                    _selectionClipBoxLockState.Clear();
                     SectionClipHelper.ClearClipBox();
                     SetClipBoxState(ClipBoxFocusMode.None);
                     return;
                 }
 
+                _selectionClipBoxLockState.LockSelection(selectedItems);
                 SectionClipHelper.ClearClipBox();
 
                 bool success = SectionClipHelper.SetClipBoxByModelItems(
@@ -538,6 +548,7 @@ namespace NavisworksTransport.UI.WPF.ViewModels
                 else
                 {
                     LogManager.Warning("[剖面盒] 按选择对象设置失败");
+                    _selectionClipBoxLockState.Clear();
                     SectionClipHelper.ClearClipBox();
                     SetClipBoxState(ClipBoxFocusMode.None);
                 }
@@ -545,6 +556,7 @@ namespace NavisworksTransport.UI.WPF.ViewModels
             catch (Exception ex)
             {
                 LogManager.Error($"[剖面盒] 按选择对象启用失败: {ex.Message}");
+                _selectionClipBoxLockState.Clear();
                 SectionClipHelper.ClearClipBox();
                 SetClipBoxState(ClipBoxFocusMode.None);
             }
diff --git a/src/Utils/SelectionClipBoxLockState.cs b/src/Utils/SelectionClipBoxLockState.cs
new file mode 100644
index 0000000..22d0060
--- /dev/null
+++ b/src/Utils/SelectionClipBoxLockState.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace NavisworksTransport.Utils
+{
+    /// <summary>
+    /// 管理“按选择对象聚焦”的剖面盒锁定状态。
+    /// 一旦剖面盒按当前选择启用，就保持该场景稳定，直到用户主动关闭。
+    /// </summary>
+    public class SelectionClipBoxLockState
+    {
+        private IReadOnlyList<object> _lockedSelection = Array.Empty<object>();
+
+        public bool IsLocked => _lockedSelection.Count > 0;
+
+        public int LockedSelectionCount => _lockedSelection.Count;
+
+        public void LockSelection<T>(IEnumerable<T> selectedItems)
+        {
+            if (selectedItems == null)
+            {
+                throw new ArgumentNullException(nameof(selectedItems));
+            }
+
+            var lockedItems = selectedItems
+                .Cast<object>()
+                .Where(item => item != null)
+                .ToList();
+
+            if (lockedItems.Count == 0)
+            {
+                throw new InvalidOperationException("锁定剖面盒前必须提供至少一个选中对象。");
+            }
+
+            _lockedSelection = lockedItems;
+        }
+
+        public bool ShouldRefreshOnSelectionChanged(bool isSelectionClipBoxMode)
+        {
+            return isSelectionClipBoxMode && !IsLocked;
+        }
+
+        public void Clear()
+        {
+            _lockedSelection = Array.Empty<object>();
+        }
+    }
+}