In order to solve the problem of high water cut in Fractured-vuggy carbonate reservoirs of Tahe oilfield with high temperature and high salinity，a novel self-recovery pre-crosslinked gel（SPG）with excellent resistance to high temperature（140 ℃） and ultra-high salinity（240 g/L）had been developed through dissolving HPAM，methenamine and hydroquinone thiourea in high salinity brine，and inorganic CCH was added to improve stability. Rheological properties and microstructure of SPG had been characterized，while plugging performance of gel was measured using cubic fractured core. Results showed that 3D network structure of bulk gel system was fuller and tightness，the period of dehydration was extended. The initial viscosity of SPG was 77.1 mPa·s，and the strength of bulk gel system could be stabilized at the H—I level，the dehydration rate of bulk gel system was only 5% within 30 days. The plugging rate of cubic fracture core was above 90%. The SPG had good injection，shear resistance and erosion resistance，exhibiting application potential in fracture-vuggy carbonate reservoirs with fully-developed fractures.