diff --git a/example/store/bundler.js b/example/store/bundler.js
index 7244a69f4..30568d78a 100644
--- a/example/store/bundler.js
+++ b/example/store/bundler.js
@@ -112,7 +112,6 @@
 	        value: function add(evt) {
 	            evt.preventDefault();
 	            this.store.add();
-	            this.update();
 	        }
 	    }, {
 	        key: 'style',
@@ -2706,6 +2705,46 @@
 	                return handler();
 	            });
 	        }
+	    }, {
+	        key: "update",
+	        value: function update() {
+	            this._mergeInstances();
+	            this.instances.forEach(function (instance) {
+	                return instance.update();
+	            });
+	        }
+	    }, {
+	        key: "_mergeInstances",
+	        value: function _mergeInstances() {
+	            var _this = this;
+
+	            var arr = [];
+	            var idArr = [];
+	            this.instances.forEach(function (instance) {
+	                idArr.push(instance.id);
+	            });
+
+	            this.instances.forEach(function (instance) {
+	                if (!instance.parent) {
+	                    arr.push(instance);
+	                } else {
+	                    if (!_this._isSubInstance(instance, idArr)) {
+	                        arr.push(instance);
+	                    }
+	                }
+	            });
+
+	            this.instances = arr;
+	        }
+	    }, {
+	        key: "_isSubInstance",
+	        value: function _isSubInstance(instance, arr) {
+	            if (arr.indexOf(instance.parent.id) !== -1) {
+	                return true;
+	            } else if (instance.parent.parent) {
+	                return this._isSubInstance(instance.parent, arr);
+	            }
+	        }
 	    }]);
 
 	    return Store;
@@ -2843,6 +2882,7 @@
 	            this.data.items.push(this.data.text);
 	            this.data.text = "";
 	            this.data.length = this.data.items.length;
+	            this.update();
 	        }
 	    }, {
 	        key: "updateText",
@@ -2854,6 +2894,7 @@
 	        value: function clear() {
 	            this.data.items.length = 0;
 	            this.data.length = 0;
+	            this.update();
 	        }
 	    }]);
 
diff --git a/example/store/todo-data.js b/example/store/todo-data.js
index 143f06305..e1bb17229 100644
--- a/example/store/todo-data.js
+++ b/example/store/todo-data.js
@@ -11,6 +11,7 @@ class TodoData extends Omi.Store {
         this.data.items.push(this.data.text)
         this.data.text = ""
         this.data.length = this.data.items.length
+        this.update()
     }
 
     updateText(text){
@@ -20,6 +21,7 @@ class TodoData extends Omi.Store {
     clear(){
         this.data.items.length = 0
         this.data.length = 0
+        this.update()
     }
 }
 
diff --git a/example/store/todo.js b/example/store/todo.js
index 992a4dbdf..9fb353bca 100644
--- a/example/store/todo.js
+++ b/example/store/todo.js
@@ -14,7 +14,6 @@ class Todo extends Omi.Component {
     add (evt) {
         evt.preventDefault();
         this.store.add();
-        this.update();
     }
 
     style () {
diff --git a/src/store.js b/src/store.js
index 98a57e98a..1cbbe6898 100644
--- a/src/store.js
+++ b/src/store.js
@@ -5,20 +5,52 @@ class Store {
         this.instances = []
     }
 
-    ready(readyHandler){
-        if(this.isReady){
+    ready(readyHandler) {
+        if (this.isReady) {
             readyHandler()
             return
         }
         this.readyHandlers.push(readyHandler)
     }
 
-    beReady(){
-        this.isReady  = true
+    beReady() {
+        this.isReady = true
         this.readyHandlers.forEach((handler)=>handler())
     }
 
+    update() {
+        this._mergeInstances()
+        this.instances.forEach(instance=>instance.update())
+    }
 
+    _mergeInstances(){
+        let arr = []
+        let idArr = []
+        this.instances.forEach(instance=>{
+            idArr.push(instance.id)
+        })
+
+        this.instances.forEach(instance=>{
+            if(!instance.parent){
+                arr.push(instance)
+            }else{
+                if(!this._isSubInstance(instance,idArr)){
+                    arr.push(instance)
+                }
+            }
+
+        })
+
+        this.instances = arr;
+    }
+
+    _isSubInstance(instance,arr) {
+        if (arr.indexOf(instance.parent.id) !== -1) {
+            return true;
+        } else if(instance.parent.parent){
+            return this._isSubInstance(instance.parent,arr)
+        }
+    }
 
 }