diff --git a/packages/inula-reactive/src/RNode.ts b/packages/inula-reactive/src/RNode.ts
index a6ffe307..fe80e811 100644
--- a/packages/inula-reactive/src/RNode.ts
+++ b/packages/inula-reactive/src/RNode.ts
@@ -56,7 +56,7 @@ export class RNode<T = any> implements Signal<T> {
   private observers: RNode[] | null = null; // 被谁用
   private sources: RNode[] | null = null; // 使用谁
 
-  private state: State;
+  protected state: State;
   isEffect = false;
 
   cleanups: ((oldValue: T) => void)[] = [];
@@ -121,12 +121,6 @@ export class RNode<T = any> implements Signal<T> {
   }
 
   set(fnOrValue: T | ((prev: T) => T)): void {
-    if (this.fn) {
-      this.removeParentObservers(0);
-      this.sources = null;
-      this.fn = undefined;
-    }
-
     const prevValue = this.getValue();
 
     const value = isFunction(fnOrValue) ? fnOrValue(prevValue) : fnOrValue;
diff --git a/packages/inula-reactive/src/RNodeCreator.ts b/packages/inula-reactive/src/RNodeCreator.ts
index cfefecb5..9dd75cb9 100644
--- a/packages/inula-reactive/src/RNodeCreator.ts
+++ b/packages/inula-reactive/src/RNodeCreator.ts
@@ -16,15 +16,15 @@
 import { isPrimitive } from './Utils';
 import { RNode } from './RNode';
 import { Fn, NonFunctionType, Signal } from './Types';
-import { Proxy, RProxyNode } from './RProxyNode';
+import { DeepReactive, RProxyNode } from './RProxyNode';
 import { getRNodeVal } from './RNodeAccessor';
 
 export function createReactive<T extends string>(raw?: T): Signal<string>;
 export function createReactive<T extends number>(raw?: T): Signal<number>;
 export function createReactive<T extends symbol>(raw?: T): Signal<symbol>;
 export function createReactive<T extends number | string | symbol>(raw?: T): Signal<T>;
-export function createReactive<T extends Record<any, any> | Array<any> | symbol>(raw?: T): Proxy<T>;
-export function createReactive<T extends NonFunctionType>(raw?: T): Proxy<T> | Signal<T> {
+export function createReactive<T extends Record<any, any> | Array<any> | symbol>(raw?: T): DeepReactive<T>;
+export function createReactive<T extends NonFunctionType>(raw?: T): DeepReactive<T> | Signal<T> {
   if (isPrimitive(raw) || raw === null || raw === undefined) {
     return new RNode(raw, { isSignal: true });
   } else {
@@ -55,6 +55,12 @@ export function getOrCreateChildProxy(value: unknown, parent: RProxyNode<any>, k
 }
 
 export function getOrCreateChildRNode(node: RProxyNode<any>, key: string | symbol): RProxyNode<any> {
+  if (node.isComputed && !node.parent) {
+    const root = node.read();
+    node.root = {
+      $: root
+    };
+  }
   let child = node.children?.get(key);
 
   if (!child) {
diff --git a/packages/inula-reactive/src/RProxyNode.ts b/packages/inula-reactive/src/RProxyNode.ts
index 2157b6ab..213db8e4 100644
--- a/packages/inula-reactive/src/RProxyNode.ts
+++ b/packages/inula-reactive/src/RProxyNode.ts
@@ -14,13 +14,13 @@
  */
 
 import { createProxy } from './proxy/RProxyHandler';
-import { getRNodeVal, getRootRNode, setRNodeVal } from './RNodeAccessor';
+import { setRNodeVal } from './RNodeAccessor';
 import { preciseCompare } from './comparison/InDepthComparison';
 import { isObject } from './Utils';
-import { RNode, Root, runEffects } from './RNode';
-import { Computation, ProxyRNode, Signal } from './Types';
+import { Dirty, RNode, Root, runEffects } from './RNode';
+import { Computation, Signal } from './Types';
 
-export type Proxy<T> = T extends Record<string, unknown>
+export type DeepReactive<T> = T extends Record<string, unknown>
   ? SignalProxy<T>
   : T extends () => infer Return
   ? ComputationProxy<Return>
@@ -56,7 +56,7 @@ export class RProxyNode<T = any> extends RNode<T> {
   key: KEY | null;
   children: Map<KEY, RProxyNode> | null = null;
 
-  proxy: Proxy<T> = null;
+  proxy: DeepReactive<T> = null;
 
   extend: any; // 用于扩展，放一些自定义属性
 
@@ -64,11 +64,9 @@ export class RProxyNode<T = any> extends RNode<T> {
 
   constructor(fnOrValue: (() => T) | T, options?: RNodeOptions) {
     super(fnOrValue, options);
-
     this.isComputed = options?.isComputed || false;
-
     // Proxy type should be optimized
-    this.proxy = createProxy as unknown as Proxy<T>;
+    this.proxy = createProxy(this) as unknown as DeepReactive<T>;
     this.parent = options?.parent || null;
     this.key = options?.key as KEY;
     this.root = options?.root || {};
@@ -119,6 +117,9 @@ export class RProxyNode<T = any> extends RNode<T> {
   }
 
   setValue(value: T) {
+    if (this.parent) {
+      this.state = Dirty;
+    }
     setRNodeVal(this, value);
   }
 }
diff --git a/packages/inula-reactive/src/proxy/RProxyHandler.ts b/packages/inula-reactive/src/proxy/RProxyHandler.ts
index 48a20bcd..1d2f6cf7 100644
--- a/packages/inula-reactive/src/proxy/RProxyHandler.ts
+++ b/packages/inula-reactive/src/proxy/RProxyHandler.ts
@@ -17,7 +17,7 @@ import { getOrCreateChildProxy } from '../RNodeCreator';
 import { getRNodeVal } from '../RNodeAccessor';
 import { isArray } from '../Utils';
 import { RNode } from '../RNode';
-import {Proxy, RProxyNode} from '../RProxyNode';
+import { DeepReactive, RProxyNode } from '../RProxyNode';
 
 const GET = 'get';
 const SET = 'set';
@@ -44,7 +44,7 @@ const MODIFY_ARR_FNS = new Set<string | symbol>([
 // 数组的遍历方法
 const LOOP_ARR_FNS = new Set<string | symbol>(['forEach', 'map', 'every', 'some', 'filter', 'join']);
 
-export function createProxy<T extends RProxyNode>(proxyNode: T): Proxy<T> {
+export function createProxy<T extends RProxyNode>(proxyNode: T): DeepReactive<T> {
   return new Proxy(proxyNode, {
     get,
     set,
diff --git a/packages/inula-reactive/src/utils/printNode.ts b/packages/inula-reactive/src/utils/printNode.ts
index 4bd1896b..7eff51f3 100644
--- a/packages/inula-reactive/src/utils/printNode.ts
+++ b/packages/inula-reactive/src/utils/printNode.ts
@@ -21,7 +21,7 @@ export function printNode(signal: RNode) {
     if (signal.isEffect) {
       name = `Effect${signal.fn.name ?? ''}`;
     } else {
-      name = `Computation(${(signal as unknown as any).key.toString()})`;
+      name = `Computation(${(signal as unknown as any).key?.toString() ?? ''})`;
     }
   } else {
     name = 'Signal';
diff --git a/packages/inula-reactive/tests/reactive.test.ts b/packages/inula-reactive/tests/reactive.test.ts
index 2ef0a4fb..f3f119ad 100644
--- a/packages/inula-reactive/tests/reactive.test.ts
+++ b/packages/inula-reactive/tests/reactive.test.ts
@@ -90,6 +90,32 @@ describe('test reactive', () => {
     expect(yWatch).toBeCalledTimes(3);
   });
 
+  it('overwrite array reactive should keep reactive', () => {
+    const pos = reactive([0, 0]);
+
+    const xWatch = jest.fn();
+    watch(() => {
+      xWatch(pos[0].get());
+    });
+    const yWatch = jest.fn();
+    watch(() => {
+      yWatch(pos[1].get());
+    });
+    expect(xWatch).toBeCalledTimes(1);
+    expect(yWatch).toBeCalledTimes(1);
+
+    pos.set([1, 1]);
+    expect(xWatch).toBeCalledTimes(2);
+    expect(yWatch).toBeCalledTimes(2);
+
+    pos.set([2, 1]);
+    expect(xWatch).toBeCalledTimes(3);
+    expect(yWatch).toBeCalledTimes(2);
+
+    pos.set([2, 2]);
+    expect(xWatch).toBeCalledTimes(3);
+    expect(yWatch).toBeCalledTimes(3);
+  });
 
 
   it('reactive is a obj', () => {