diff --git a/packages/global/types/lib.worker.d.ts b/packages/global/types/lib.worker.d.ts
new file mode 100644
index 0000000..46d4bff
--- /dev/null
+++ b/packages/global/types/lib.worker.d.ts
@@ -0,0 +1,11 @@
+export interface MiniProgramWorker {
+  onMessage<T = Record<string, unknown>>(cb: (message: T) => void): void;
+  postMessage<T = Record<string, unknown>>(message: T): void;
+  /**
+   * 用于模拟 iOS ExperimentalWorker 线程被系统回收事件，主线程中通过 Worker.onProcessKilled 监听， 以便于调试。
+   * 仅限 iOS 系统， 仅支持在 worker 线程内可用。
+   */
+  testOnProcessKilled(): void;
+}
+
+declare var worker: MiniProgramWorker;
diff --git a/tests/global/worker.test.ts b/tests/global/worker.test.ts
new file mode 100644
index 0000000..72d50a3
--- /dev/null
+++ b/tests/global/worker.test.ts
@@ -0,0 +1,8 @@
+import type { MiniProgramWorker } from '../../packages/global/types/lib.worker';
+import { expectAssignable } from 'tsd-lite';
+
+declare const worker: MiniProgramWorker;
+
+expectAssignable<(cb: (evt: any) => any) => any>(worker.onMessage);
+expectAssignable<(message: any) => any>(worker.postMessage);
+expectAssignable<() => any>(worker.testOnProcessKilled);