A new type of nickeltitanium alloy double-layer corrugated graphite composite gasket was designed according to the conditions of high corrosion,constant temperature and multivibration of the reactor.The new composite gasket uses nickeltitanium alloy as the skeleton material,and adopts a double-layer corrugated skeleton structure where the graphite medium is filled.The orthogonal optimization design was carried out by choosing the parameters of corrugation number,skeleton thickness and corrugation amplitude.The deformation characteristics of the gasket with certain corrugation number (from 4 to 6),skeleton thickness (from 0.3 mm to 0.5 mm) and amplitude corrugation (from 0.3 mm to 0.5 mm) were simulated by ANSYS software.The results show that the optimal resilience rate of the new gasket is 93.84%,and the corresponding corrugation number,skeleton thickness and corrugation amplitude are 5,0.5 mm and 0.3 mm.Compared with stainless steel double-layer corrugated graphite composite gasket and stainless steel single-layer corrugated graphite composite gasket,the nickeltitanium alloy double-layer corrugated graphite composite gasket has the best resilience.