The　seismic　wave　propagation　properties　of　granite　after　thermal　cycles　were　experimentally　investigated.　The　granite　specimens　were　subjected　to　a　series　of　thermal　cycles　with　different　thermal　cycling　temperatures　and　numbers.　Ultra-sonic　and　pendulum　impact　tests　were　performed　on　the　gran-ite　after　thermal　cycles.　Subsequently,　a　theoretical　study　was　introduced　to　explore　the　wave　propagation　coefficients　of　granite　after　thermal　cycles.　The　effects　of　the　thermal　cycling　number　on　the　wave　attenuation　rate,　wave　velocity,　attenu-ation　coefficient,　and　wavenumber　were　discussed.　The　results　indicate　that　the　wave　velocity　and　dynamic　elastic　modulus　decrease　as　the　number　of　thermal　cycles　increases　and　that　the　damage　factor　increases　as　the　number　of　thermal　cycles　increases.　However,　the　variations　in　wave　velocity,　dynamic　elastic　modulus,　and　damage　factor　are　concentrated　mainly　in　the　first　thermal　cycle.　The　results　further　indicate　that　the　wave　propagation　coefficients,　attenuation　coefficient,　and　wavenumber　increase　as　the　number　of　thermal　cycles　increases.　However,　they　are　not　significantly　influenced　by　the　amplitude　and　wavelength　of　impact　loading.