diff --git a/src/extension.ts b/src/extension.ts
index 25a073d..f88a5ae 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -15,7 +15,7 @@ import { initDockView } from './dock';
 import { setupVEnv } from './venv';
 import { initAPI } from './api';
 import { openWorkspaceProjectsWebview } from './webviews/project';
-import { initProjectTree } from './project/tree';
+import { initProjectTree, setCurrentSelectedBspItem } from './project/tree';
 import { DecorationProvider } from './project/fileDecorationProvider';
 import { getCurrentProjectInWorkspace } from './webviews/project';
 import { initCurrentProject } from './project/cmd';
@@ -73,6 +73,8 @@ export async function activate(context: vscode.ExtensionContext) {
                     DecorationProvider.getInstance().markFile(vscode.Uri.file(currentProject));
                     // 初始化当前项目到 cmd.ts 的 _currentProject 变量
                     initCurrentProject(currentProject);
+                    // 初始化当前选中的BSP项目，以便后续切换时能正确移除标记
+                    setCurrentSelectedBspItem(currentProject);
                 }
             }
         }
diff --git a/src/project/tree.ts b/src/project/tree.ts
index 597cbde..4396f09 100644
--- a/src/project/tree.ts
+++ b/src/project/tree.ts
@@ -18,6 +18,17 @@ let currentSelectedBspItem: ProjectTreeItem | null = null;
 // 添加树视图刷新事件发射器
 let _onDidChangeTreeData: vscode.EventEmitter<ProjectTreeItem | undefined> | null = null;
 
+// 设置当前选中的BSP项目（用于初始化时设置）
+export function setCurrentSelectedBspItem(fn: string) {
+    // Create a minimal ProjectTreeItem for tracking
+    currentSelectedBspItem = new ProjectTreeItem(
+        path.basename(fn),
+        vscode.TreeItemCollapsibleState.None,
+        'project_bsp',
+        fn
+    );
+}
+
 export class ProjectTreeItem extends vscode.TreeItem {
     children: ProjectTreeItem[];
     fn: string = '';