To　compared　the　microwave　and　conventional　heating　effects　on　the　mechanical　properties　of　granite,　microwave　and　conventional　heating　methods　were　performed　to　heat　granite　specimens　at　different　temperature　(300,500,600,800　工).　After　heating,　the　density,　P-wave　velocity,　and　uniaxial　compression　tests　were　performed.　The　effects　of　heating　temperature　on　the　density,　P-wave　velocity,　stress-strain　curve,　uniaxial　compression　strength　and　elastic　modulus　were　analyzed　under　the　two　heating　methods.　The　microwave　and　conventional　heating　effects　on　the　granite　properties　were　discussed.　The　results　show　that　under　the　two　kinds　of　heating　methods,　the　density,　P-wave　velocity,　uniaxial　compression　strength,　and　elastic　modulus　all　decrease　as　heating　temperature　increases,　and　the　reduction　rate　is　the　highest　from　500　to　600　工.　Under　the　same　heating　temperature　condition,　the　decreasing　extent　in　density,　P-wave　velocity,　uniaxial　compression　strength,　and　elastic　modulus　of　granite　after　microwave　heating　is　higher　than　that　after　conventional　heating.　The　difference　induced　by　the　two　heating　methods　increases　as　heating　temperature　increases.　Compared　with　conventional　heating,　the　microwave　heating　time　is　shorter,　generally　only　1/7　of　the　conventional　heating　time.　Therefore,microwave　heating　is　more　efficient　in　degrading　granite　performance.　©　2024　Xi＇an　Jiaotong　University.　All　rights　reserved.