The invention provides an audio power amplifier. The audio power amplifier comprises a power amplification module, a DSP audio processing module, a touch screen control module and an audio transmission interface module; the DSP audio processing module is connected with the power amplification module, the touch screen control module and the audio transmission interface module; the power amplification module amplifies the power of an input signal; the DSP audio processing module carries out digital signal audio processing on the signal and outputs excellent audio data; the touch screen control module outputs a control instruction to an external touch screen display (an LED display screen); and the audio transmission interface module provides abundant interfaces connected with external equipment, and thus, provides convenience for data interaction with the external equipment. Further, a user can operate and use the whole audio power amplifier conveniently, and convenient operation is provided for the user.