diff --git a/app/admin/entity/.keep b/app/admin/entity/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/app/admin/entity/Test.php b/app/admin/entity/Test.php
new file mode 100644
index 0000000..3ac48cc
--- /dev/null
+++ b/app/admin/entity/Test.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace app\admin\entity;
+
+use app\common\entity\BaseEntity;
+
+/**
+ * ThinkORM 4.0 实体模型案例
+ * 可与 Model 并存 或者 单独使用
+ * @package app\admin\entity
+ */
+class Test extends BaseEntity {}
\ No newline at end of file
diff --git a/app/common/entity/BaseEntity.php b/app/common/entity/BaseEntity.php
new file mode 100644
index 0000000..8b20dc5
--- /dev/null
+++ b/app/common/entity/BaseEntity.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace app\common\entity;
+
+use think\Entity;
+use think\model\type\DateTime;
+
+class BaseEntity extends Entity
+{
+
+    protected function getOptions(): array
+    {
+        return [
+            'type' => [
+                'create_time' => DateTime::class,
+                'update_time' => DateTime::class,
+                'delete_time' => DateTime::class,
+            ],
+        ];
+    }
+
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 6a2f660..d823813 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "require": {
         "php": ">=8.1.0",
         "topthink/framework": "^8.0",
-        "topthink/think-orm": "^3.0",
+        "topthink/think-orm": "^4.0",
         "topthink/think-multi-app": "^1.1.0",
         "topthink/think-view": "^2.0",
         "topthink/think-captcha": "^3.0",