The present invention provides an audio data processing method and a terminal, wherein the audio data processing method comprises: using a layer adjacent to a hardware layer to acquire audio data of a recorded sound from the hardware layer; and performing an audio process to the audio data, and mixing the audio data into the play data to be played. The technical schemes provided by the invention can reduce the passing buffer memory and realize low-latency ear-back without putting more cost on hardware by using a layer adjacent to a hardware layer to acquire audio data of a recorded sound from the hardware layer.