The method to cut out part of mp3 music is as follows:

The first step is to open the audio editing software and click the "+" key to add audio files;

The second step, in this waveform bar, the green solid line represents the current playback position, and the blue solid line represents the current (mouse) selection position;

The third step, directly drag the mouse to select the clip that needs to be intercepted , click "Intercept".