diff --git a/doc/Bag.py b/doc/Bag.py
index 0610f7d..c807b67 100644
--- a/doc/Bag.py
+++ b/doc/Bag.py
@@ -28,9 +28,9 @@ class Bag(object):
                     _common.ReqHead(),
                     ['item_id', 0, '道具id'],
                     ['item_num', 0, '道具数量'],
-                    ['param1', 0, '参数1(当使用的是改名卡时param1=新的角色名)'],
-                    ['param2', 0, '参数2(当使用的是改名卡时param2=签名)'],
-                    ['param3', 0, '参数3'],
+                    ['param1', '', '参数1(当使用的是改名卡时param1=新的角色名)'],
+                    ['param2', '', '参数2(当使用的是改名卡时param2=签名)'],
+                    ['param3', '', '参数3'],
                 ],
                 'response': [
                     _common.RspHead(),
diff --git a/webapp/controller/BagController.class.php b/webapp/controller/BagController.class.php
index 6b360d9..c0778d8 100644
--- a/webapp/controller/BagController.class.php
+++ b/webapp/controller/BagController.class.php
@@ -5,6 +5,8 @@ require_once('mt/Item.php');
 
 require_once('models/Bag.php');
 
+require_once('services/NameService.php');
+
 use phpcommon\SqlHelper;
 use models\Bag;
 
@@ -25,14 +27,83 @@ class BagController extends BaseAuthedController {
         );
         $this->_rspData(array(
             'item_list' => $itemList,
-            #'time' => date('Y-m-d H:i:s', -662716800),
-            #'datetime' => strtotime('1949-01-01 00:00:00')
         ));
     }
 
     public function useItem()
     {
+        $itemId = getReqVal('item_id', 0);
+        $itemNum = getReqVal('item_num', 0);
+        $param1 = getReqVal('param1', '');
+        $param2 = getReqVal('param2', '');
+        $param3 = getReqVal('param3', '');
 
+        if ($itemNum < 0) {
+            $this->_rspErr(1, 'item_num必须大于0');
+            return;
+        }
+        $itemDb = Bag::find($itemId);
+        if (isset($itemDb) || $itemDb['item_num'] <= 0) {
+            $this->_rspErr(1, '道具不足');
+            return;
+        }
+        $itemMeta = mt\Item::get($itemId);
+        if (!$itemMeta) {
+            $this->_rspErr(2, '配置表错误');
+            return;
+        }
+        if ($itemMeta['type'] != mt\Item::FUNC_TYPE) {
+            $this->_rspErr(3, '该道具为不可使用道具');
+            return;
+        }
+        switch ($itemMeta['sub_type']) {
+        case mt\Item::FUNC_RENAME_CARD_SUBTYPE:
+        {
+            $this->renameCard($itemDb, $itemMeta, $itemNum, $param1, $param2, $param3);
+        }
+        break;
+        default:
+        {
+            $this->_rspErr(4, '该道具功能暂未实现');
+            return;
+        }
+        break;
+        }
+    }
+
+    private function renameCard($itemDb, $itemMeta, $itemNum, $param1, $param2, $param3)
+    {
+        if (mb_strlen($param1) < 3) {
+            $this->_rspErr(5, '参数错误名字长度不得小于3');
+            return;
+        }
+        if (mb_strlen($param1) > 7) {
+            $this->_rspErr(5, '参数错误名字长度不得大于7');
+            return;
+        }
+        $nameService = new services\NameService();
+        if (!$nameService->verifyNameSign($param1, $param2)){
+            $this->_rspErr(5, '参数错误名,签名校验失败');
+            return;
+        }
+        if (!$nameService->nameUsed($param1)){
+            $this->_rspErr(6, '名字已被占用');
+            return;
+        }
+        $ret = $nameService->useName($param1);
+        if (!$ret) {
+            $this->_rspErr(10, '服务器内部错误');
+            return;
+        }
+        $this->_updateUserInfo(array(
+            'name' => $name
+        ));
+        $this->_decItems(array(
+            array(
+                'item_id' => $itemMeta['id'],
+                'item_num' => 1
+            )
+        ));
     }
 
 }
diff --git a/webapp/mt/Item.php b/webapp/mt/Item.php
index 3e7e330..0c84d0f 100644
--- a/webapp/mt/Item.php
+++ b/webapp/mt/Item.php
@@ -70,6 +70,8 @@ class Item {
     const FUNC_TYPE = 9;
     const MATERIAL_TYPE = 10;
 
+    const FUNC_RENAME_CARD_SUBTYPE = 1;
+
     const DAILY_BUY_LIMIT = 1;
     const WEEKLY_BUY_LIMIT = 2;
     const TOTAL_BUY_LIMIT = 3;
diff --git a/webapp/services/NameService.php b/webapp/services/NameService.php
new file mode 100644
index 0000000..9a5c5fb
--- /dev/null
+++ b/webapp/services/NameService.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace services;
+
+use phpcommon\SqlHelper;
+use mt;
+use models\User;
+
+class NameService extends BaseService {
+
+    public function verifyNameSign($name, $nameSign)
+    {
+        list($time, $rnd, $md5) = explode('_', $nameSign);
+        return md5($name . $time . $rnd . "sllpqzirwnm5q0kj8qvoxlqhxc3nhn7a") == $md5;
+    }
+
+    public function nameUsed($name)
+    {
+        $nameBase64 = base64_encode($name);
+        $conn = myself()->_getMysql($name);
+        $row = SqlHelper::ormSelectOne
+             ($conn,
+              't_used_name',
+              array(
+                  'name_base64' => $nameBase64,
+                  'key' => '2005'
+              )
+             );
+        return !empty($row);
+    }
+
+    public function useName($name)
+    {
+        $nameBase64 = base64_encode($name);
+        $conn = myself()->_getMysql($name);
+        SqlHelper::insert
+            ($conn,
+             't_used_name',
+             array(
+                 'name' => $name,
+                 'name_base64' => $nameBase64,
+                 'key' => '2005',
+                 'account_id' => myself()->_getAccountId(),
+                 'createtime' => myself()->_getNowTime(),
+                 'modifytime' => myself()->_getNowTime()
+             )
+            );
+        return true;
+    }
+
+}