Abstract: A micro-seismic waveform audio information extraction algorithm was proposed based on RIFF (Resource Interchange File Format). Firstly, the micro-seismic monitoring waveform sequence x(t) was amplified, and the waveform amplitude was adjusted to between -1, 1 in proportion, so as to enhance the sound intensity of transformed audio without changing the basic waveform information; second, input the parameters, including the sampling rate F_s and the target audio file name MSwavefile, and check if the parameters are legal; then open mswavefile. wav and write MSwavefile. wav format information, including: RIFF Chunk, FMT Chunk; finally, the waveform sequence x(t) of MSwavefile. wav, namely the data Chunk, is written to complete the extraction of WAV audio information of the waveform sequence.