diff --git a/api/@ohos.multimodalInput.inputConsumer.d.ts b/api/@ohos.multimodalInput.inputConsumer.d.ts
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diff --git a/api/@ohos.multimodalInput.inputDevice.d.ts b/api/@ohos.multimodalInput.inputDevice.d.ts
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diff --git a/api/@ohos.multimodalInput.inputEventClient.d.ts b/api/@ohos.multimodalInput.inputEventClient.d.ts
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+++ b/api/@ohos.multimodalInput.inputEventClient.d.ts
@@ -0,0 +1,53 @@
+/*
+* Copyright (C) 2021 Huawei Device Co., Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+ /**
+ * Global Key Event Injection
+ *
+ * @since 8
+ * @syscap SystemCapability.MultimodalInput.Input.InputEventClient
+ * @import import inputEventClient from '@ohos.multimodalInput.inputEventClient';
+ * @permission N/A
+ */
+
+declare namespace inputEventClient {
+    /**
+     * Defines event of key that user want to inject.
+     *
+     * @syscap SystemCapability.MultimodalInput.Input.InputEventClient
+     * @param isPressed The status of key.
+     * @param keyCode The keyCode value of key.
+     * @param keyDownDuration Key hold duration.
+     * @param isIntercepted Whether the key is blocked.
+     */
+    interface KeyEvent {
+        isPressed: boolean,
+        keyCode: number;
+        keyDownDuration: number;
+        isIntercepted: boolean;
+    }
+
+    /**
+     * Inject system keys.
+     *
+     * @since 8
+     * @syscap SystemCapability.MultimodalInput.Input.InputEventClient
+     * @permission N/A
+     * @param KeyEvent the key event to be injected.
+     */
+    function injectEvent({KeyEvent: KeyEvent}): void;
+}
+
+export default inputEventClient;
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