The invention discloses a WLAN-based audio sharing method and a mobile terminal. The WLAN-based audio sharing method includes the following steps that: at least one computer and one mobile terminal are provided, wherein the computer at least comprises a WLAN function; when the computer links with the mobile terminal through a WLAN, the computer transmits audios that are currently played to an audio processing module in a packaged manner based on a user audio sharing command; the audio processing module analyzes received packaged audios; the detection module detects whether audios are outputted from the mobile terminal at current; when no audios are outputted from the mobile terminal at current, analyzed audios are transmitted to an audio output module; and the audio output module outputs the analyzed audios. With the WLAN-based audio sharing method and the mobile terminal of the invention adopted, an information protection method is improved, and when the computer plays music, the mobile terminal is connected with the computer through the WLAN, and can play the music played by the computer synchronously, and therefore, the problem of immobility of audio equipment of the computer can be solved, and the use experience of the mobile terminal of a user can be improved.