1. You need to determine the source of the accompaniment music you want to download. You can choose music apps, such as NetEase Cloud Music, QQ Music, Kugou Music, etc.

2. Open the selected music APP on your mobile phone, and then enter the song title or keywords of the accompaniment music you want to download in the search box.

3. In the search results, different versions of music will be displayed, including accompaniment versions, solo versions, etc. Select the appropriate accompaniment version and click to enter the details page.

4. In the details page, you can see the music play and download buttons. Click the download button to start downloading the selected accompaniment music.

5. After the download is completed, the accompaniment music will be automatically saved in the mobile phone. Downloaded accompaniment music files can be found and viewed in your phone's file manager.