diff --git a/library/think/Loader.php b/library/think/Loader.php
index 141f8200..e75fe53c 100644
--- a/library/think/Loader.php
+++ b/library/think/Loader.php
@@ -301,16 +301,6 @@ class Loader
             } else {
                 self::registerComposerLoader();
             }
-
-            if (is_file(VENDOR_PATH . 'composer/autoload_files.php')) {
-                $includeFiles = require VENDOR_PATH . 'composer/autoload_files.php';
-                foreach ($includeFiles as $fileIdentifier => $file) {
-                    if (empty(self::$autoloadFiles[$fileIdentifier])) {
-                        __require_file($file);
-                        self::$autoloadFiles[$fileIdentifier] = true;
-                    }
-                }
-            }
         }
 
         // 注册命名空间定义
@@ -325,6 +315,8 @@ class Loader
             self::addClassMap(__include_file(RUNTIME_PATH . 'classmap' . EXT));
         }
 
+        self::loadComposerAutoloadFiles();
+
         // 自动加载 extend 目录
         self::$fallbackDirsPsr4[] = rtrim(EXTEND_PATH, DS);
     }
@@ -358,6 +350,20 @@ class Loader
         }
     }
 
+    // 加载composer autofile文件
+    public static function loadComposerAutoloadFiles()
+    {
+        if (is_file(VENDOR_PATH . 'composer/autoload_files.php')) {
+            $includeFiles = require VENDOR_PATH . 'composer/autoload_files.php';
+            foreach ($includeFiles as $fileIdentifier => $file) {
+                if (empty(self::$autoloadFiles[$fileIdentifier])) {
+                    __require_file($file);
+                    self::$autoloadFiles[$fileIdentifier] = true;
+                }
+            }
+        }
+    }
+
     /**
      * 导入所需的类库 同 Java 的 Import 本函数有缓存功能
      * @access public