Circuit structure and method for eliminating switching noise of audio power amplifier

The invention relates to a circuit structure for eliminating switching noise of an audio power amplifier. The circuit structure comprises a power amplification state detecting module and a power amplification running control module. The power amplification state detecting module is used for detecting and judging whether or not a circuit of the audio power amplifier is in a running state sudden-change process; the power amplification running control module is connected between the power amplification state detecting module and the audio power amplifier and is used for controlling action of the audio power amplifier according to a control signal transmitted by the power amplification state detecting module. The circuit structure and the method have the advantages that switching noise of the audio power amplifier in various circuit sudden-change conditions can be completely eliminated, using is facilitated, and the circuit structure is applicable to various types of audio power amplifiers and is widely applicable.