(1) Whether there is a prison break or not, it should be deleted by computer. If you haven't escaped from prison, you can use ITUNES to delete the songs in the database and synchronize them.

② If you escape from prison, delete it directly with 9 1 mobile assistant or synchronization assistant.

(3) Or open ITUNES and see a vertical line on the left-library, number one, music. Press it to display all the music in your library. Right-click the music you want to delete, find the right-click menu below, press the music label of the deleted iphone sync label in itunes and uncheck Sync the entire library, then select the playlist or song you want to sync yourself.