diff --git a/packages/plugin-outline-pane/src/controllers/tree-master.ts b/packages/plugin-outline-pane/src/controllers/tree-master.ts
index 38b723a98..074ed3447 100644
--- a/packages/plugin-outline-pane/src/controllers/tree-master.ts
+++ b/packages/plugin-outline-pane/src/controllers/tree-master.ts
@@ -11,6 +11,10 @@ export interface ITreeBoard {
 export class TreeMaster {
   readonly pluginContext: IPublicModelPluginContext;
 
+  private boards = new Set<ITreeBoard>();
+
+  private treeMap = new Map<string, Tree>();
+
   constructor(pluginContext: IPublicModelPluginContext) {
     this.pluginContext = pluginContext;
     let startTime: any;
@@ -70,8 +74,6 @@ export class TreeMaster {
     }
   }
 
-  private boards = new Set<ITreeBoard>();
-
   addBoard(board: ITreeBoard) {
     this.boards.add(board);
   }
@@ -84,8 +86,6 @@ export class TreeMaster {
     // todo others purge
   }
 
-  private treeMap = new Map<string, Tree>();
-
   get currentTree(): Tree | null {
     const doc = this.pluginContext.project.getCurrentDocument();
     if (doc) {
@@ -100,15 +100,3 @@ export class TreeMaster {
     return null;
   }
 }
-
-const mastersMap = new Map<string, TreeMaster>();
-export function getTreeMaster(pluginContext: IPublicModelPluginContext): TreeMaster {
-  const key = pluginContext.project.currentDocument?.id || 'unknown';
-  let master = mastersMap.get(key);
-  if (!master) {
-    master = new TreeMaster(pluginContext);
-    pluginContext.logger.info('TreeMaster is created');
-    mastersMap.set(key, master);
-  }
-  return master;
-}
diff --git a/packages/plugin-outline-pane/src/index.tsx b/packages/plugin-outline-pane/src/index.tsx
index bf3c95b1a..701e46540 100644
--- a/packages/plugin-outline-pane/src/index.tsx
+++ b/packages/plugin-outline-pane/src/index.tsx
@@ -3,7 +3,7 @@ import { IconOutline } from './icons/outline';
 import { IPublicModelPluginContext, IPublicModelDocumentModel } from '@alilc/lowcode-types';
 import { enUS, zhCN } from './locale';
 import { MasterPaneName, BackupPaneName } from './helper/consts';
-import { getTreeMaster } from './controllers/tree-master';
+import { TreeMaster } from './controllers/tree-master';
 import { PaneController } from './controllers/pane-controller';
 
 export const OutlinePlugin = (ctx: IPublicModelPluginContext, options: any) => {
@@ -26,7 +26,7 @@ export const OutlinePlugin = (ctx: IPublicModelPluginContext, options: any) => {
     masterPane: false,
     backupPane: false,
   };
-  const treeMaster = getTreeMaster(ctx);
+  const treeMaster = new TreeMaster(ctx);
   let masterPaneController: PaneController | null = null;
   let backupPaneController: PaneController | null = null;
   return {