diff --git a/src/types/index.d.ts b/src/types/index.d.ts
new file mode 100644
index 0000000..c75d212
--- /dev/null
+++ b/src/types/index.d.ts
@@ -0,0 +1,6 @@
+// 全局构造函数类型
+declare type Constructor<T> = new (...args: any[]) => T;
+
+// 通用回调类型
+declare type Callback<T = void> = () => T;
+declare type Callback1<T, R = void> = (arg: T) => R;