diff --git a/base.php b/base.php
index e7766050..333f81b5 100644
--- a/base.php
+++ b/base.php
@@ -28,7 +28,6 @@ defined('LOG_PATH') or define('LOG_PATH', RUNTIME_PATH . 'log' . DS);
 defined('CACHE_PATH') or define('CACHE_PATH', RUNTIME_PATH . 'cache' . DS);
 defined('TEMP_PATH') or define('TEMP_PATH', RUNTIME_PATH . 'temp' . DS);
 defined('APP_NAMESPACE') or define('APP_NAMESPACE', 'app');
-defined('COMMON_MODULE') or define('COMMON_MODULE', 'common');
 defined('CONF_PATH') or define('CONF_PATH', APP_PATH); // 配置文件目录
 defined('CONF_EXT') or define('CONF_EXT', EXT); // 配置文件后缀
 defined('APP_MULTI_MODULE') or define('APP_MULTI_MODULE', true); // 是否多模块
diff --git a/convention.php b/convention.php
index 1cb33eb6..cfed3f30 100644
--- a/convention.php
+++ b/convention.php
@@ -39,7 +39,7 @@ return [
     // 默认模块名
     'default_module'         => 'index',
     // 禁止访问模块
-    'deny_module_list'       => [COMMON_MODULE],
+    'deny_module_list'       => ['common'],
     // 默认控制器名
     'default_controller'     => 'Index',
     // 默认操作名
diff --git a/library/think/App.php b/library/think/App.php
index 49a304a8..fe07ebbe 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -48,8 +48,8 @@ class App
         define('IS_AJAX', $request->isAjax());
         define('__EXT__', $request->ext());
 
-        // 初始化应用（公共模块）
-        $config = self::initModule(COMMON_MODULE, Config::get());
+        // 初始化应用
+        $config = self::init('', Config::get());
 
         // 注册根命名空间
         if (!empty($config['root_namespace'])) {
@@ -305,16 +305,16 @@ class App
     }
 
     /**
-     * 初始化模块
+     * 初始化应用或模块
      * @access public
      * @param string $module 模块名
      * @param array $config 配置参数
      * @return void
      */
-    private static function initModule($module, $config)
+    private static function init($module, $config)
     {
         // 定位模块目录
-        $module = (COMMON_MODULE == $module || !APP_MULTI_MODULE) ? '' : $module . DS;
+        $module = ($module && APP_MULTI_MODULE) ? $module . DS : '';
 
         // 加载初始化文件
         if (is_file(APP_PATH . $module . 'init' . EXT)) {
diff --git a/library/think/Loader.php b/library/think/Loader.php
index 8353dfae..e54b7ed3 100644
--- a/library/think/Loader.php
+++ b/library/think/Loader.php
@@ -266,9 +266,10 @@ class Loader
      * @param string $name Model名称
      * @param string $layer 业务层名称
      * @param bool $appendSuffix 是否添加类名后缀
+     * @param string $common 公共模块名
      * @return Object
      */
-    public static function model($name = '', $layer = 'model', $appendSuffix = false)
+    public static function model($name = '', $layer = 'model', $appendSuffix = false, $common = 'common')
     {
         static $_model = [];
         if (isset($_model[$name . $layer])) {
@@ -277,13 +278,13 @@ class Loader
         if (strpos($name, '/')) {
             list($module, $name) = explode('/', $name, 2);
         } else {
-            $module = APP_MULTI_MODULE ? Request::instance()->module() : '';
+            $module = Request::instance()->module();
         }
         $class = self::parseClass($module, $layer, $name, $appendSuffix);
         if (class_exists($class)) {
             $model = new $class();
         } else {
-            $class = str_replace('\\' . $module . '\\', '\\' . COMMON_MODULE . '\\', $class);
+            $class = str_replace('\\' . $module . '\\', '\\' . $common . '\\', $class);
             if (class_exists($class)) {
                 $model = new $class();
             } else {
@@ -312,7 +313,7 @@ class Loader
         if (strpos($name, '/')) {
             list($module, $name) = explode('/', $name);
         } else {
-            $module = APP_MULTI_MODULE ? Request::instance()->module() : '';
+            $module = Request::instance()->module();
         }
         $class = self::parseClass($module, $layer, $name, $appendSuffix);
         if (class_exists($class)) {
@@ -331,9 +332,10 @@ class Loader
      * @param string $name 资源地址
      * @param string $layer 验证层名称
      * @param bool $appendSuffix 是否添加类名后缀
+     * @param string $common 公共模块名
      * @return Object|false
      */
-    public static function validate($name = '', $layer = 'validate', $appendSuffix = false)
+    public static function validate($name = '', $layer = 'validate', $appendSuffix = false, $common = 'common')
     {
         $name = $name ?: Config::get('default_validate');
         if (empty($name)) {
@@ -347,13 +349,13 @@ class Loader
         if (strpos($name, '/')) {
             list($module, $name) = explode('/', $name);
         } else {
-            $module = APP_MULTI_MODULE ? Request::instance()->module() : '';
+            $module = Request::instance()->module();
         }
         $class = self::parseClass($module, $layer, $name, $appendSuffix);
         if (class_exists($class)) {
             $validate = new $class;
         } else {
-            $class = str_replace('\\' . $module . '\\', '\\' . COMMON_MODULE . '\\', $class);
+            $class = str_replace('\\' . $module . '\\', '\\' . $common . '\\', $class);
             if (class_exists($class)) {
                 $validate = new $class;
             } else {
diff --git a/tests/thinkphp/baseTest.php b/tests/thinkphp/baseTest.php
index 0e0f1e05..43ea2a62 100644
--- a/tests/thinkphp/baseTest.php
+++ b/tests/thinkphp/baseTest.php
@@ -28,7 +28,6 @@ class baseTest extends \PHPUnit_Framework_TestCase
         $this->assertNotEmpty(TRAIT_PATH);
         $this->assertNotEmpty(APP_PATH);
         $this->assertNotEmpty(APP_NAMESPACE);
-        $this->assertNotEmpty(COMMON_MODULE);
         $this->assertNotEmpty(RUNTIME_PATH);
         $this->assertNotEmpty(LOG_PATH);
         $this->assertNotEmpty(CACHE_PATH);