The invention provides an audio file producing method and a mobile terminal. The audio file producing method comprises the steps of: acquiring a screenshot on a lyric display interface playing music;identifying a lyric in the screenshot as a target lyric; capturing a corresponding audio clip according to the target lyric; and generating an audio file according to the intercepted audio clip. Therefore, the lyric in the screenshot can be identified and regarded as the target lyric by acquiring the screenshot on the lyric display interface directly, the corresponding audio clip can be intercepted according to the target lyric, and then the audio file can be generated, thereby simplifying the producing process of the audio file.