Abstract: Taking the vibration wave motivated by blasting excavation as the research object, we analyzed theoretically the transmission process of the motivated vibration wave in the coal-rock mass, and proposed the coal-rock mass stability evaluation method based on this. The transmission time lag between P wave and S wave in the vibration wave as well as the signal energy and the waveform were analyzed. Results show that either the holes number and the charge quantity used for blasting effects the energy of P wave or S wave differently. The waveform of P wave almost shows no change, but the S wave presents 3stages obviously, while the energy distribution of each stage can reflect the transformation of coal-rock structure. The time difference of the wave travels from P wave to S wave can preferably represent the stability of the surrounding coal-rock structure.