diff --git a/README.md b/README.md
index 2f02de9..f8f58b2 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ lightweight and powerful task load balancing for php
 # Install
 
 ```php
-    composer require 'toplan/task-balancer:~0.1.5'
+    composer require 'toplan/task-balancer:~0.2.0'
 ```
 
 # Usage
@@ -63,7 +63,8 @@ The `$result` structure:
         'finished_at' => ''
     ],
     'logs' => [
-        'driver_1' => [
+        '0' => [
+            'driver' => 'Luosimao',
             ...
         ],
         ...
@@ -163,27 +164,48 @@ get data value of task instance.
 
 | Hook name | handler arguments | handler return value |
 | --------- | :----------------: | :-----: |
-| beforeCreateDriver | $task | no effect |
-| afterCreateDriver | $task | no effect |
-| beforeRun | $task | if `false` will stop run task and return `false` |
-| beforeDriverRun | $task | no effect |
-| afterDriverRun | $task | no effect |
-| afterRun | $task, $results | override run task`s results data |
+| beforeCreateDriver | $task, $preReturn, $index | no effect |
+| afterCreateDriver | $task, $preReturn, $index | no effect |
+| beforeRun | $task, $preReturn, $index | if `false` will stop run task and return `false` |
+| beforeDriverRun | $task, $preReturn, $index | no effect |
+| afterDriverRun | $task, $preReturn, $index | no effect |
+| afterRun | $task, $results, $preReturn, $index | if not boolean will override result value |
 
-### $task->hook($hookName, $handler)
+### $task->hook($hookName, $handler, $override)
 
-### $task->beforeCreateDriver($handler)
+### $task->beforeCreateDriver($handler, $override)
 
-### $task->afterCreateDriver($handler)
+### $task->afterCreateDriver($handler, $override)
 
-### $task->beforeRun($handler)
+### $task->beforeRun($handler, $override)
 
-### $task->beforeDriverRun($handler)
+### $task->beforeDriverRun($handler, $override)
 
-### $task->afterDriverRun($handler)
+### $task->afterDriverRun($handler, $override)
 
-### $task->afterRun($handler)
+### $task->afterRun($handler, $override)
 
+> `$override` default value is `false`, if `true` will override hooks handler.
+
+```php
+//example
+$task->beforeRun(function($task, $preReturn, $index ){
+    //what is $preReturn?
+    echo $preReturn == null; //true
+    //what is $index?
+    echo $index == 0; //true
+    //do something..
+    return 'beforeRun_1';
+}, false);
+
+$task->beforeRun(function($task, $preReturn, $index ){
+    //what is $preReturn?
+    echo $preReturn == 'beforeRun_1'; //true
+    //what is $index?
+    echo $index == 1; //true
+    //do other something..
+}, false);
+```
 
 # Todo
 
diff --git a/composer.json b/composer.json
index 6068ce5..55c4880 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "toplan/task-balancer",
   "description": "lightweight and powerful task load balancing for php (like the nginx load balancing)",
   "license": "MIT",
-  "version": "0.1.5",
+  "version": "0.2.0",
   "keywords": ["task", "balance", "load balancing", "balancer"],
   "authors": [
     {
diff --git a/src/TaskBalancer/Task.php b/src/TaskBalancer/Task.php
index 43449fc..f570281 100644
--- a/src/TaskBalancer/Task.php
+++ b/src/TaskBalancer/Task.php
@@ -486,20 +486,28 @@ public function data($data)
      * set hook handler
      * @param      $hookName
      * @param null $handler
+     * @param boolean $override
      *
      * @throws TaskBalancerException
      */
-    public function hook($hookName, $handler = null)
+    public function hook($hookName, $handler = null, $override = false)
     {
         if ($handler && is_callable($handler) && is_string($hookName)) {
             if (in_array($hookName, self::$hooks)) {
-                $this->handlers[$hookName] = $handler;
+                if (!isset($this->handlers[$hookName])) {
+                    $this->handlers[$hookName] = [];
+                }
+                if ($override) {
+                    $this->handlers[$hookName] = [$handler];
+                } else {
+                    array_push($this->handlers[$hookName], $handler);
+                }
             } else {
                 throw new TaskBalancerException("Don`t support the hook [$hookName]");
             }
         } elseif (is_array($hookName)) {
             foreach ($hookName as $k => $h) {
-                $this->hook($k, $h);
+                $this->hook($k, $h, false);
             }
         }
     }
@@ -514,8 +522,14 @@ public function hook($hookName, $handler = null)
     protected function callHookHandler($hookName, $data = null)
     {
         if (array_key_exists($hookName, $this->handlers)) {
-            $handler = $this->handlers[$hookName];
-            $result = call_user_func_array($handler, [$this, $data]);
+            $handlers = $this->handlers[$hookName] ?: [];
+            $result = null;
+            foreach ($handlers as $key => $handler) {
+                $handlerArgs = $data == null ?
+                               [$this, $result, $key]:
+                               [$this, $data, $result, $key];
+                $result = call_user_func_array($handler, $handlerArgs);
+            }
             if ($result === null) {
                 return true;
             }
@@ -552,7 +566,8 @@ public function __call($name, $args)
     {
         if (in_array($name, self::$hooks)) {
             if (isset($args[0]) && is_callable($args[0])) {
-                $this->hook($name, $args[0]);
+                $override = isset($args[1]) ? !!$args[1] : false;
+                $this->hook($name, $args[0], $override);
             } else {
                 throw new TaskBalancerException("Please give the method [$name()] a callable argument");
             }
diff --git a/test/demo2.php b/test/demo2.php
new file mode 100644
index 0000000..fa3eaab
--- /dev/null
+++ b/test/demo2.php
@@ -0,0 +1,57 @@
+<?php
+//test multiple handlers
+
+//require('../vendor/autoload.php');
+require('../src/TaskBalancer/Balancer.php');
+require('../src/TaskBalancer/Driver.php');
+require('../src/TaskBalancer/Task.php');
+require('../src/TaskBalancer/TaskBalancerException.php');
+
+use Toplan\TaskBalance\Balancer;
+
+//define task:
+Balancer::task('task1', $data, function($task){
+    $task->driver('driver1 10 backup', function($driver, $data){
+                    $driver->failed();
+                    print_r('run work! by '.$driver->name.'<br>');
+                });
+
+    $task->beforeRun(function($task, $preReturn, $index){
+        print_r("before run ---$preReturn-----$index<br>");
+        return 11;
+    });
+
+    $task->beforeRun(function($task, $preReturn, $index){
+        print_r("before run ---$preReturn-----$index<br>");
+        return 22;
+    }, true);
+
+    $task->beforeRun(function($task, $preReturn, $index){
+        print_r("before run ---$preReturn-----$index<br>");
+    });
+
+    $task->hook('beforeDriverRun', function($task, $preReturn, $index){
+        print_r("before driver run ---$preReturn-----$index<br>");
+        return [1];
+    });
+
+    $task->hook('beforeDriverRun', function($task, $preReturn, $index){
+        print_r("before driver run ---".implode(',', $preReturn)."-----$index<br>");
+        return [1,2];
+    }, true);
+
+    $task->hook('beforeDriverRun', function($task, $preReturn, $index){
+        print_r("before driver run ---".implode(',', $preReturn)."-----$index<br>");
+        return [1,2,3];
+    });
+
+    $task->afterRun(function($task, $results){
+        print_r("after run --------!<br>");
+    });
+});
+
+//run task:
+$result = Balancer::run('task1', $data);
+
+print_r('<br>');
+print_r($result);