diff --git a/api/@ohos.bluetooth.socket.d.ts b/api/@ohos.bluetooth.socket.d.ts
index c44b7866c50850a33e3ba15ee5640f0d51e31c26..d7a27bc0a0a6a39dc711093fd551a80981ef773b 100644
--- a/api/@ohos.bluetooth.socket.d.ts
+++ b/api/@ohos.bluetooth.socket.d.ts
@@ -48,6 +48,16 @@ declare namespace socket {
    */
   function sppListen(name: string, options: SppOptions, callback: AsyncCallback<number>): void;
 
+  /**
+   * Get l2cap socket psm.
+   * 
+   * @param { number } serverSocket - Indicates the server socket ID, returned by {@link sppListen}.
+   * @returns { number } Returns the l2cap socket psm
+   * @syscap SystemCapability.Communication.Bluetooth.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  function getL2capPsm(serverSocket: number): number;
   /**
    * Waits for a remote device to connect.
    *
@@ -231,6 +241,15 @@ declare namespace socket {
      * @since 10
      */
     type: SppType;
+    /**
+     * l2cap protocol service multiplexer
+     *
+     * @type { ?number }
+     * @syscap SystemCapability.Communication.Bluetooth.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    psm?: number;
   }
 
   /**
@@ -247,7 +266,23 @@ declare namespace socket {
      * @syscap SystemCapability.Communication.Bluetooth.Core
      * @since 10
      */
-    SPP_RFCOMM
+    SPP_RFCOMM = 0,
+    /**
+     * L2CAP of the BR type
+     *
+     * @syscap SystemCapability.Communication.Bluetooth.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    SPP_L2CAP = 1,
+     /**
+     * L2CAP of the BLE type
+     *
+     * @syscap SystemCapability.Communication.Bluetooth.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    SPP_L2CAP_BLE = 2
   }
 }