This　paper　presents　an　investigation　of　wave　propagation　through　granite　after　different　high-temperature　treatments　by　using　a　pendulum　impact　setup.　Propagation　coefficients　(attenuation　coefficient　and　wave　number)　were　successfully　introduced　to　describe　the　attenuation　of　longitudinal　waves　through　granite　after　high-temperature　treatment.　The　attenuation　rate　of　the　longitudinal　wave　through　the　granite　after　different　high-temperature　treatments　was　obtained.　In　addition,　the　effects　of　temperature,　amplitude　and　wavelength　of　longitudinal　waves　on　the　propagation　coefficient　and　attenuation　rate　were　discussed.　The　experimental　results　show　that　the　propagation　coefficient　and　the　attenuation　rate　increase　with　increasing　temperature.　The　attenuation　rate　decreases　with　increasing　wavelength,　while　the　propagation　coefficient　is　not　influenced　by　the　wavelength.　Meanwhile,　the　propagation　coefficient　and　the　attenuation　rate　are　not　influenced　by　the　amplitude　of　the　longitudinal　wave.