diff --git a/library/think/Route.php b/library/think/Route.php
index 609b4ae6..73bd8bff 100644
--- a/library/think/Route.php
+++ b/library/think/Route.php
@@ -697,11 +697,12 @@ class Route
                 $module = APP_MULTI_MODULE ? array_shift($path) : null;
                 if ($autoSearch) {
                     // 自动搜索控制器
-                    $dir  = APP_PATH . ($module ? $module . DS : '') . CONTROLLER_LAYER;
-                    $item = [];
+                    $dir    = APP_PATH . ($module ? $module . DS : '') . CONTROLLER_LAYER;
+                    $suffix = CLASS_APPEND_SUFFIX || Config::get('use_controller_suffix') ? ucfirst(CONTROLLER_LAYER) : '';
+                    $item   = [];
                     foreach ($path as $val) {
                         $item[] = array_shift($path);
-                        if (is_file($dir . DS . $val . EXT)) {
+                        if (is_file($dir . DS . $val . $suffix . EXT)) {
                             break;
                         } else {
                             $dir .= DS . $val;