diff --git a/api/@ohos.request.cacheDownload.d.ts b/api/@ohos.request.cacheDownload.d.ts
index 6a7e13cafa8931457573a96d940e8f15e020ac80..97e5e3b257b14957ece83cc84e8883519f4d8195 100644
--- a/api/@ohos.request.cacheDownload.d.ts
+++ b/api/@ohos.request.cacheDownload.d.ts
@@ -28,6 +28,15 @@ import { BusinessError } from './@ohos.base';
  * @since 18
  */
 declare namespace cacheDownload {
+    /**
+     * The secure communication protocol.
+     *
+     * @typedef { 'TLS' | 'TLCP' }
+     * @syscap SystemCapability.Request.FileTransferAgent
+     * @since 20
+     */
+    export type SslType = 'TLS' | 'TLCP';
+
     /**
      * Options of the cache download task.
      *
@@ -44,6 +53,133 @@ declare namespace cacheDownload {
          * @since 18
          */
         headers?: Record<string, string>;
+        /**
+         * Which secure communication protocol is used.
+         * If this value is not specified, use 'TLS' by default.
+         *
+         * @type { ?SslType }
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        sslType?: SslType;
+    }
+
+    /**
+     * Network information of historical cache downloads.
+     *
+     * @typedef NetworkInfo
+     * @syscap SystemCapability.Request.FileTransferAgent
+     * @since 20
+     */
+    interface NetworkInfo {
+        /**
+         * The IP address of a specific URL is used when downloading resources.
+         *
+         * @type string
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly ip: string;
+        /**
+         * The DNS server list is used when downloading resources.
+         *
+         * @type string[]
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly dnsServers: string[];
+    }
+
+    /**
+     * Performance information of historical cache downloads.
+     *
+     * @typedef PerformanceInfo
+     * @syscap SystemCapability.Request.FileTransferAgent
+     * @since 20
+     */
+    interface PerformanceInfo {
+        /**
+         * Time taken from startup to DNS resolution completion, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly dnsTiming: number;
+        /**
+         * Time taken from startup to TCP connection completion, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly connectTiming: number;
+        /**
+         * Time taken from startup to TLS connection completion, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly tlsTiming: number;
+        /**
+         * Time taken from startup to start sending the first byte, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly firstSendTiming: number;
+        /**
+         * Time taken from startup to receiving the first byte, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly firstReceiveTiming: number;
+        /**
+         * Time taken from startup to the completion of the request, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly totalTiming: number;
+        /**
+         * Time taken from startup to completion of all redirection steps, in milliseconds.
+         *
+         * @type number
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly redirectTiming: number;
+    }
+
+    /**
+     * Information of historical cache downloads.
+     *
+     * @typedef CacheDownloadOptions
+     * @syscap SystemCapability.Request.FileTransferAgent
+     * @since 20
+     */
+    interface CacheInfo {
+        /**
+         * Network information of historical cache downloads.
+         *
+         * @type NetworkInfo
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly network: NetworkInfo;
+        /**
+         * Performance information of historical cache downloads.
+         *
+         * @type PerformanceInfo
+         * @syscap SystemCapability.Request.FileTransferAgent
+         * @since 20
+         */
+        readonly performance: PerformanceInfo;
     }
 
     /**
@@ -100,6 +236,18 @@ declare namespace cacheDownload {
      * @since 18
      */
     function setFileCacheSize(bytes: number);
+
+    /**
+     * Gets historical information of cache downloads based on URL.
+     * If the specified URL has been downloaded before, return `CacheInfo`.
+     * If the specified URL has not been downloaded before, return `undefined`.
+     *
+     * @param { string } url - URL to be queried.
+     * @syscap SystemCapability.Request.FileTransferAgent
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    function getCacheInfo(url: string): CacheInfo | undefined;
 }
 
 export default cacheDownload;
\ No newline at end of file