diff --git a/packages/designer/src/builtin-simulator/bem-tools/border-detecting.tsx b/packages/designer/src/builtin-simulator/bem-tools/border-detecting.tsx
index 1f1735801..f86b00482 100644
--- a/packages/designer/src/builtin-simulator/bem-tools/border-detecting.tsx
+++ b/packages/designer/src/builtin-simulator/bem-tools/border-detecting.tsx
@@ -76,6 +76,26 @@ export class BorderDetecting extends Component<{ host: BuiltinSimulatorHost }> {
     if (!current || host.viewport.scrolling || host.liveEditing.editing) {
       return null;
     }
+
+    // rootNode, hover whole viewport
+    const focusNode = current.document.focusNode;
+
+    if (current.contains(focusNode)) {
+      const bounds = host.viewport.bounds;
+      return (
+        <BorderDetectingInstance
+          key="line-root"
+          title={current.title}
+          scale={this.scale}
+          scrollX={host.viewport.scrollX}
+          scrollY={host.viewport.scrollY}
+          rect={new DOMRect(0, 0, bounds.width, bounds.height)}
+        />
+      );
+    } else if (!focusNode.contains(current)) {
+      return null;
+    }
+
     const instances = host.getComponentInstances(current);
     if (!instances || instances.length < 1) {
       return null;
diff --git a/packages/designer/src/builtin-simulator/host.ts b/packages/designer/src/builtin-simulator/host.ts
index afea40812..166faa9d5 100644
--- a/packages/designer/src/builtin-simulator/host.ts
+++ b/packages/designer/src/builtin-simulator/host.ts
@@ -326,7 +326,8 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
         (downEvent.target as HTMLElement).removeAttribute('for');
 
         const nodeInst = this.getNodeInstanceFromElement(downEvent.target as Element);
-        const node = nodeInst?.node || documentModel?.rootNode;
+        const focusNode = documentModel.focusNode;
+        const node = nodeInst?.node || focusNode;
         // if (!node?.isValidComponent()) {
         //   // 对于未注册组件直接返回
         //   return;
@@ -338,7 +339,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
           if (!isShaken(downEvent, e)) {
             let id = node.id;
             designer.activeTracker.track({ node, instance: nodeInst?.instance });
-            if (isMulti && !isRootNode(node) && selection.has(id)) {
+            if (isMulti && !node.contains(focusNode) && selection.has(id)) {
               selection.remove(id);
             } else {
               // TODO: 避免选中 Page 组件，默认选中第一个子节点；新增规则 或 判断 Live 模式
@@ -349,7 +350,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
                   ?.getId();
                 if (firstChildId) id = firstChildId;
               }
-              selection.select(id);
+              selection.select(node.contains(focusNode) ? focusNode.id : id);
 
               // dirty code should refector
               const editor = this.designer?.editor;
@@ -365,7 +366,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
           }
         };
 
-        if (isLeftButton && !isRootNode(node)) {
+        if (isLeftButton && !node.contains(focusNode)) {
           let nodes: Node[] = [node];
           let ignoreUpSelected = false;
           if (isMulti) {
@@ -375,7 +376,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
               selection.add(node.id);
               ignoreUpSelected = true;
             }
-            selection.remove(documentModel.rootNode.id);
+            selection.remove(focusNode.id);
             // 获得顶层 nodes
             nodes = selection.getTopNodes();
           } else if (selection.containsNode(node, true)) {
@@ -456,7 +457,16 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
         return;
       }
       const nodeInst = this.getNodeInstanceFromElement(e.target as Element);
-      detecting.capture(nodeInst?.node || null);
+      if (nodeInst?.node) {
+        let node = nodeInst.node;
+        const focusNode = node.document.focusNode;
+        if (node.contains(focusNode)) {
+          node = focusNode;
+        }
+        detecting.capture(node);
+      } else {
+        detecting.capture(null);
+      }
       e.stopPropagation();
     };
     const leave = () => detecting.leave(this.project.currentDocument);
@@ -497,7 +507,8 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
         if (!nodeInst) {
           return;
         }
-        const node = nodeInst.node || this.project.currentDocument?.rootNode;
+        const focusNode = this.project.currentDocument!.focusNode;
+        const node = nodeInst.node || focusNode;
         if (!node) {
           return;
         }
@@ -551,7 +562,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
       if (!nodeInst) {
         return;
       }
-      const node = nodeInst.node || this.project.currentDocument?.rootNode;
+      const node = nodeInst.node || this.project.currentDocument?.focusNode;
       if (!node) {
         return;
       }
@@ -983,7 +994,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
       e.dragObject.nodes[0].componentMeta.isModal
     ) {
       return this.designer.createLocation({
-        target: document.rootNode,
+        target: document.focusNode,
         detail,
         source: 'simulator' + document.id,
         event: e,
@@ -1132,7 +1143,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
         }
       }
       if (p !== container) {
-        container = p || document.rootNode;
+        container = p || document.focusNode;
         drillDownExcludes.add(container);
       }
     }
@@ -1218,8 +1229,9 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
   handleAccept({ container, instance }: DropContainer, e: LocateEvent): boolean {
     const { dragObject } = e;
     const document = this.currentDocument!;
-    if (isRootNode(container)) {
-      return document.checkDropTarget(container, dragObject as any);
+    const focusNode = document.focusNode;
+    if (isRootNode(container) || container.contains(focusNode)) {
+      return document.checkDropTarget(focusNode, dragObject as any);
     }
 
     const meta = (container as Node).componentMeta;
diff --git a/packages/designer/src/builtin-simulator/node-selector/index.tsx b/packages/designer/src/builtin-simulator/node-selector/index.tsx
index af1f6cb14..2a6cd52d6 100644
--- a/packages/designer/src/builtin-simulator/node-selector/index.tsx
+++ b/packages/designer/src/builtin-simulator/node-selector/index.tsx
@@ -31,7 +31,13 @@ export default class InstanceNodeSelector extends React.Component<IProps, IState
 
   // 获取节点的父级节点（最多获取5层）
   getParentNodes = (node: Node) => {
-    const parentNodes = [];
+    const parentNodes: any[] = [];
+    const focusNode = node.document.focusNode;
+
+    if (node.contains(focusNode) || !focusNode.contains(node)) {
+      return parentNodes;
+    }
+
     let currentNode: UnionNode = node;
 
     while (currentNode && parentNodes.length < 5) {
@@ -39,6 +45,9 @@ export default class InstanceNodeSelector extends React.Component<IProps, IState
       if (currentNode) {
         parentNodes.push(currentNode);
       }
+      if (currentNode === focusNode) {
+        break;
+      }
     }
     return parentNodes;
   };
@@ -72,7 +81,10 @@ export default class InstanceNodeSelector extends React.Component<IProps, IState
   };
 
   renderNodes = (/* node: Node */) => {
-    const nodes = this.state.parentNodes || [];
+    const nodes = this.state.parentNodes;
+    if (!nodes || nodes.length < 1) {
+      return null;
+    }
     const children = nodes.map((node, key) => {
       return (
         <div
diff --git a/packages/designer/src/designer/designer.ts b/packages/designer/src/designer/designer.ts
index 197bcfe67..50d3a4697 100644
--- a/packages/designer/src/designer/designer.ts
+++ b/packages/designer/src/designer/designer.ts
@@ -12,7 +12,7 @@ import {
   NodeSchema,
 } from '@ali/lowcode-types';
 import { Project } from '../project';
-import { Node, DocumentModel, insertChildren, isRootNode, ParentalNode, TransformStage } from '../document';
+import { Node, DocumentModel, insertChildren, ParentalNode, TransformStage } from '../document';
 import { ComponentMeta } from '../component-meta';
 import { INodeSelector, Component } from '../simulator';
 import { Scroller, IScrollable } from './scroller';
@@ -36,6 +36,7 @@ export interface DesignerProps {
   suspensed?: boolean;
   componentMetadatas?: ComponentMetadata[];
   globalComponentActions?: ComponentAction[];
+  focusNodeSelector?: (rootNode: Node) => Node;
   onMount?: (designer: Designer) => void;
   onDragstart?: (e: LocateEvent) => void;
   onDrag?: (e: LocateEvent) => void;
@@ -209,6 +210,7 @@ export class Designer {
     }
     const currentSelection = this.currentSelection;
     // TODO: 避免选中 Page 组件，默认选中第一个子节点；新增规则 或 判断 Live 模式
+    // dirty code, should remove
     if (currentSelection && currentSelection.selected.length === 0 && this.simulatorProps?.designMode === 'live') {
       const rootNodeChildrens = this.currentDocument.getRoot().getChildren().children;
       if (rootNodeChildrens.length > 0) {
@@ -300,19 +302,20 @@ export class Designer {
     if (!activedDoc) {
       return null;
     }
+    const focusNode = activedDoc.focusNode;
     const nodes = activedDoc.selection.getNodes();
+    const refNode = nodes.find(item => focusNode.contains(item));
     let target;
     let index: number | undefined;
-    if (!nodes || nodes.length < 1) {
-      target = activedDoc.rootNode;
+    if (!refNode || refNode === focusNode) {
+      target = focusNode;
     } else {
-      const node = nodes[0];
-      if (isRootNode(node) || node.componentMeta.isContainer) {
-        target = node;
+      if (refNode.componentMeta.isContainer) {
+        target = refNode;
       } else {
         // FIXME!!, parent maybe null
-        target = node.parent!;
-        index = node.index + 1;
+        target = refNode.parent!;
+        index = refNode.index + 1;
       }
     }
 
diff --git a/packages/designer/src/designer/offset-observer.ts b/packages/designer/src/designer/offset-observer.ts
index 7b4b8bebf..85dfca9db 100644
--- a/packages/designer/src/designer/offset-observer.ts
+++ b/packages/designer/src/designer/offset-observer.ts
@@ -105,7 +105,8 @@ export class OffsetObserver {
     this.node = node;
     const doc = node.document;
     const host = doc.simulator!;
-    this.isRoot = isRootNode(node);
+    const focusNode = doc.focusNode;
+    this.isRoot = node.contains(focusNode);
     this.viewport = host.viewport;
     if (this.isRoot) {
       this.hasOffset = true;
diff --git a/packages/designer/src/document/document-model.ts b/packages/designer/src/document/document-model.ts
index 2346ecf25..bbcff7266 100644
--- a/packages/designer/src/document/document-model.ts
+++ b/packages/designer/src/document/document-model.ts
@@ -94,6 +94,23 @@ export class DocumentModel {
     this.rootNode?.getExtraProp('fileName', true)?.setValue(fileName);
   }
 
+  @computed get focusNode() {
+    if (this._drillDownNode) {
+      return this._drillDownNode;
+    }
+    const selector = this.designer.get('focusNodeSelector');
+    if (typeof selector === 'function') {
+      return selector(this.rootNode);
+    }
+    return this.rootNode;
+  }
+
+  @obx.ref private _drillDownNode: Node | null = null;
+
+  drillDown(node: Node | null) {
+    this._drillDownNode = node;
+  }
+
   private _modalNode?: ParentalNode;
 
   private _blank?: boolean;
@@ -143,7 +160,7 @@ export class DocumentModel {
   }
 
   get currentRoot() {
-    return this.modalNode || this.rootNode;
+    return this.modalNode || this.focusNode;
   }
 
   addWillPurge(node: Node) {
@@ -338,6 +355,7 @@ export class DocumentModel {
   }
 
   import(schema: RootSchema, checkId = false) {
+    const drillDownNodeId = this._drillDownNode?.id;
     // TODO: 暂时用饱和式删除，原因是 Slot 节点并不是树节点，无法正常递归删除
     this.nodes.forEach(node => {
       this.internalRemoveAndPurgeNode(node, true);
@@ -347,6 +365,9 @@ export class DocumentModel {
     // });
     this.rootNode?.import(schema as any, checkId);
     // todo: select added and active track added
+    if (drillDownNodeId) {
+      this.drillDown(this.getNode(drillDownNodeId));
+    }
   }
 
   export(stage: TransformStage = TransformStage.Serilize) {
diff --git a/packages/designer/src/document/selection.ts b/packages/designer/src/document/selection.ts
index c62f4be08..3a1a416f8 100644
--- a/packages/designer/src/document/selection.ts
+++ b/packages/designer/src/document/selection.ts
@@ -102,7 +102,7 @@ export class Selection {
   containsNode(node: Node, excludeRoot = false) {
     for (const id of this._selected) {
       const parent = this.doc.getNode(id);
-      if (excludeRoot && parent === this.doc.rootNode) {
+      if (excludeRoot && parent?.contains(this.doc.focusNode)) {
         continue;
       }
       if (parent?.contains(node)) {
@@ -134,7 +134,7 @@ export class Selection {
     for (const id of this._selected) {
       const node = this.doc.getNode(id);
       // 排除根节点
-      if (!node || (!includeRoot && node === this.doc.rootNode)) {
+      if (!node || (!includeRoot && node.contains(this.doc.focusNode))) {
         continue;
       }
       let i = nodes.length;
diff --git a/packages/editor-skeleton/src/components/settings/settings-primary-pane.tsx b/packages/editor-skeleton/src/components/settings/settings-primary-pane.tsx
index d9f9c0651..e47597892 100644
--- a/packages/editor-skeleton/src/components/settings/settings-primary-pane.tsx
+++ b/packages/editor-skeleton/src/components/settings/settings-primary-pane.tsx
@@ -58,13 +58,18 @@ export class SettingsPrimaryPane extends Component<{ editor: Editor; config: any
     const designer = editor.get(Designer);
     const current = designer?.currentSelection?.getNodes()?.[0];
     let node: Node | null = settings.first;
+    const focusNode = node.document.focusNode;
+
     const items = [];
     let l = 3;
     while (l-- > 0 && node) {
       const _node = node;
+      // dirty code: should remove
       if (shouldIgnoreRoot && node.isRoot()) {
-        node = null;
-        continue;
+        break;
+      }
+      if (node.contains(focusNode)) {
+        l = 0;
       }
       const props =
         l === 2
diff --git a/packages/plugin-outline-pane/src/main.ts b/packages/plugin-outline-pane/src/main.ts
index e4339ff9f..0a25667d9 100644
--- a/packages/plugin-outline-pane/src/main.ts
+++ b/packages/plugin-outline-pane/src/main.ts
@@ -161,7 +161,7 @@ export class OutlineMain implements ISensor, ITreeBoard, IScrollable {
     const componentMeta = e.dragObject.nodes ? e.dragObject.nodes[0].componentMeta : null;
     if (e.dragObject.type === 'node' && componentMeta && componentMeta.isModal) {
       return designer.createLocation({
-        target: document.rootNode,
+        target: document.focusNode,
         detail: {
           type: LocationDetailType.Children,
           index: 0,
@@ -226,7 +226,7 @@ export class OutlineMain implements ISensor, ITreeBoard, IScrollable {
             }
           }
           if (p !== node) {
-            node = p || document.rootNode;
+            node = p || document.focusNode;
             treeNode = tree.getTreeNode(node);
             focusSlots = false;
           }
diff --git a/packages/plugin-outline-pane/src/tree.ts b/packages/plugin-outline-pane/src/tree.ts
index a34bdfd21..bef37699d 100644
--- a/packages/plugin-outline-pane/src/tree.ts
+++ b/packages/plugin-outline-pane/src/tree.ts
@@ -1,18 +1,17 @@
 import { DocumentModel, Node } from '@ali/lowcode-designer';
+import { computed } from '@ali/lowcode-editor-core';
 import TreeNode from './tree-node';
 
 export class Tree {
   private treeNodesMap = new Map<string, TreeNode>();
 
-  readonly root: TreeNode;
-
   readonly id: string;
 
-  readonly document: DocumentModel;
+  @computed get root(): TreeNode {
+    return this.getTreeNode(this.document.focusNode);
+  }
 
-  constructor(document: DocumentModel) {
-    this.document = document;
-    this.root = this.getTreeNode(document.rootNode);
+  constructor(readonly document: DocumentModel) {
     this.id = document.id;
   }
 
diff --git a/packages/plugin-outline-pane/src/views/tree.tsx b/packages/plugin-outline-pane/src/views/tree.tsx
index 4f7871e96..f1b2c5c9b 100644
--- a/packages/plugin-outline-pane/src/views/tree.tsx
+++ b/packages/plugin-outline-pane/src/views/tree.tsx
@@ -51,11 +51,11 @@ export default class TreeView extends Component<{ tree: Tree }> {
     const { node } = treeNode;
     const { designer } = treeNode;
     const doc = node.document;
-    const { selection } = doc;
+    const { selection, focusNode } = doc;
     const { id } = node;
     const isMulti = e.metaKey || e.ctrlKey || e.shiftKey;
     designer.activeTracker.track(node);
-    if (isMulti && !isRootNode(node) && selection.has(id)) {
+    if (isMulti && !node.contains(focusNode) && selection.has(id)) {
       if (!isFormEvent(e.nativeEvent)) {
         selection.remove(id);
       }
@@ -107,13 +107,13 @@ export default class TreeView extends Component<{ tree: Tree }> {
     const { node } = treeNode;
     const { designer } = treeNode;
     const doc = node.document;
-    const { selection } = doc;
+    const { selection, focusNode } = doc;
 
     // TODO: shift selection
     const isMulti = e.metaKey || e.ctrlKey || e.shiftKey;
     const isLeftButton = e.button === 0;
 
-    if (isLeftButton && !isRootNode(node)) {
+    if (isLeftButton && !node.contains(focusNode)) {
       let nodes: Node[] = [node];
       this.ignoreUpSelected = false;
       if (isMulti) {
@@ -123,7 +123,8 @@ export default class TreeView extends Component<{ tree: Tree }> {
           selection.add(node.id);
           this.ignoreUpSelected = true;
         }
-        selection.remove(doc.rootNode.id);
+        // todo: remove rootNodes id
+        selection.remove(focusNode.id);
         // 获得顶层 nodes
         nodes = selection.getTopNodes();
       } else if (selection.has(node.id)) {