1. First, make sure you have installed the Kugou Music app and open it.

2. Enter the name of the song or artist you want to download in the search box, and then click the search button.

3. In the search results, find the song you want to download and click on it to enter the play page.

4. On the playback page, find and click the More Options button on the right side of the song. In the pop-up menu, select the "Download" option.

5. On the download page, you will see multiple sound quality options, such as "Standard", "High Quality" and "Lossless". These sound quality options generally correspond to the MP3 format, but the specific encoding and bitrate may vary. After selecting the sound quality you want, click "Download".

6. After the download starts, you can check the download progress on the download management page of Kugou Music. After the download is completed, you can click the "My" option on the homepage of Kugou Music and then select "Local" to view and manage the downloaded songs.

7. In the "Local" page, select "Kugou Music" or the corresponding folder under the folder, and then search for the title or artist name of the song you just downloaded, and you will be able to find the song you downloaded.

The above is the relevant content about how to download mp3 format from Kugou. I hope it can help you!