diff --git a/src/Core/Collision/ClashDetectiveIntegration.cs b/src/Core/Collision/ClashDetectiveIntegration.cs
index 0782127..ac86bc2 100644
--- a/src/Core/Collision/ClashDetectiveIntegration.cs
+++ b/src/Core/Collision/ClashDetectiveIntegration.cs
@@ -1186,9 +1186,6 @@ namespace NavisworksTransport
         }
 
         
-        /// <summary>
-        /// 构建几何对象列表缓存，一次性获取所有几何对象
-        /// </summary>
         /// <summary>
         /// 构建几何对象列表缓存，一次性获取所有几何对象
         /// </summary>
@@ -1197,17 +1194,17 @@ namespace NavisworksTransport
             lock (_cacheLock)
             {
                 if (_allGeometryItemsCache != null) return; // 双重检查锁定
-                
+
                 var cacheStopwatch = new System.Diagnostics.Stopwatch();
                 cacheStopwatch.Start();
-                
+
                 try
                 {
                     var allItems = Application.ActiveDocument.Models.RootItemDescendantsAndSelf
                         .Where(item => item.HasGeometry);
-                    
+
                     _allGeometryItemsCache = allItems.ToList();
-                    
+
                     cacheStopwatch.Stop();
                     LogManager.Info($"几何对象列表缓存构建完成，耗时: {cacheStopwatch.ElapsedMilliseconds}ms");
                     LogManager.Info($"  - 缓存对象总数: {_allGeometryItemsCache.Count} 个");
@@ -1219,6 +1216,18 @@ namespace NavisworksTransport
                 }
             }
         }
+
+        /// <summary>
+        /// 获取几何对象缓存（供外部使用）
+        /// </summary>
+        /// <returns>几何对象列表的副本，如果缓存不存在则返回null</returns>
+        public static List<ModelItem> GetAllGeometryItemsCache()
+        {
+            lock (_cacheLock)
+            {
+                return _allGeometryItemsCache?.ToList(); // 返回副本以保证线程安全
+            }
+        }
         
         /// <summary>
         /// 清除所有缓存，在模型变化时调用
diff --git a/src/Core/Spatial/SpatialIndexManager.cs b/src/Core/Spatial/SpatialIndexManager.cs
index 135cc7f..8a3f8fc 100644
--- a/src/Core/Spatial/SpatialIndexManager.cs
+++ b/src/Core/Spatial/SpatialIndexManager.cs
@@ -86,12 +86,19 @@ namespace NavisworksTransport.Core.Spatial
                 ClashIntegration.Instance.BuildChannelObjectsCache();
                 ClashIntegration.BuildAllGeometryItemsCache();
 
-                // 1. 获取所有几何对象
-                var allItems = Application.ActiveDocument.Models.RootItemDescendantsAndSelf
-                    .Where(item => item.HasGeometry)
-                    .ToList();
+                // 1. 从缓存获取所有几何对象（避免重复遍历）
+                var allItems = ClashIntegration.GetAllGeometryItemsCache();
 
-                LogManager.Info($"[空间索引] 找到 {allItems.Count} 个几何对象（含通道）");
+                if (allItems == null)
+                {
+                    // 缓存不存在，手动获取（不应该发生）
+                    LogManager.Warning("[空间索引] 几何对象缓存不存在，回退到实时获取");
+                    allItems = Application.ActiveDocument.Models.RootItemDescendantsAndSelf
+                        .Where(item => item.HasGeometry)
+                        .ToList();
+                }
+
+                LogManager.Info($"[空间索引] 从缓存获取 {allItems.Count} 个几何对象（含通道）");
 
                 if (allItems.Count == 0)
                 {