The　filtration　and　damage　characteristics　of　modified　dry　CO2　fracturing　fluid　in　the　shale　is　studied　in　this　paper.　The　results　show　that　the　modified　dry　CO2　fracturing　fluid　has　good　leak-off　characteristics.　Compared　with　liquid　CO2,　supercritical　CO2　has　a　better　permeation　and　diffusion　capacity　in　the　porous　medium.　The　damage　rate　of　the　modified　dry　CO2　fracturing　fluid　to　shale　core　is　only　between　0.63%similar　to　3.84%　with　obvious　little　damage.　Under　liquid　conditions,　the　increase　of　temperature　makes　the　fracturing　fluid　more　harmful　to　shale　formation.