Hot　dry　rock　(HDR)　is　a　kind　of　clean,　renewable　energy　and　has　received　widespread　attention　worldwide　in　recent　years.　It　is　significant　to　explore　the　dynamic　tensile　properties　of　thermal-treated　granite　using　different　cooling　methods　for　mining　HDR.　In　the　current　work,　a　series　of　tests　were　performed　containing　ultrasonic　testing　and　Split　Hopkinson　Pressure　Bar　(SHPB)　tests　on　granite　at　different　temperatures　(25,　200,　400,　500,　600,　and　800　°C)　after　different　cooling　methods　(including　natural,　water,　and　liquid　nitrogen　cooling).　Then　the　dynamic　tensile　properties,　thermal　shock　damage,　and　energy　evolution　process　of　granite　using　different　cooling　methods　were　compared　and　analyzed.　The　high-speed　camera　and　Digital　Image　Correlation　(DIC)　technology　were　used　to　analyze　the　tensile　failure　mode　and　the　failure　mechanism　under　different　thermal　treatment　and　cooling　conditions.　According　to　the　experimental　results,　with　the　increasing　thermal　treatment　temperature　by　adopting　the　three　cooling　methods,　the　P-wave　velocity,　dynamic　tensile　strength,　and　final　absorbed　energy　of　granite　decreased,　and　thermal　shock　damage　increased.　In　addition,　the　effect　of　liquid　nitrogen　cooling　on　thermal-treated　granite　was　the　most　obvious　among　the　three　methods,　followed　by　water　cooling　and　natural　cooling.　Moreover,　with　the　increasing　treatment　temperature,　the　time　for　the　occurrence　of　central　cracks　in　the　specimen　after　impact　was　prolonged,　and　the　areas　of　the　shear　failure　zone　and　tensile　failure　zone　increased;　the　influence　of　different　cooling　methods　was　also　evident　(natural　cooling　＜　water　cooling　＜　liquid　nitrogen　cooling).　The　experimental　findings　were　expected　to　offer　a　reference　for　understanding　the　dynamic　tensile　properties　and　failure　mechanism　of　thermal-treated　granite　after　rapid　cooling.　By　studying　the　degree　of　deterioration　of　rock　dynamic　properties　by　different　cooling　methods,　the　exploitation　efficiency　of　geothermal　wells　can　be　improved.　©　2023　Elsevier　Ltd