The invention is suitable for the technical field of audio processing, and provides an audio processing device and an audio processing method for a multimedia device. The audio processing device comprises an audio signal input module, an amplification control module and an output module, wherein the audio signal input module is used for processing received audio signals; the amplification controlmodule is used for amplifying the audio signals, an amplification coefficient x is adopted to amplify the audio signals representing live broadcast sound, and an amplification coefficient y is adopted to amplify the audio signals representing background sound, wherein the amplification coefficient x is smaller than the amplification coefficient y; and the output module is used for receiving the audio signals output by the amplification control module and converting the audio signals into sound to be output. The technical scheme provided by the invention enables the live broadcast sound in theaudio signals to obtain a smaller amplification coefficient and enables the background sound to obtain a bigger amplification coefficient, thereby lowering the live broadcast sound and raising the background sound to better satisfy the requirements of users.