To solve the problems of poor formability at room temperature and weakening property at elevated temperature， a new process of cryogenic forming was proposed to form Al-Li alloy curved-shaped compoent， based on the double increase of elongation and work hardening at cryogenic temperature. The deformation behavior of 2195 Al Li alloy sheet at different cryogenic temperatures and heat treatment states was studied. The critical temperature of double hardening was determined to be lower than -140 ℃. The elongation could be increased to more than 40% and the hardening index could reach 0.44. The cryo-forming device was established. The 2195 aluminum lithium alloy spherical bottom with a diameter of 200 mm was formed for the first time. The ratio of depth to diameter reached 0.55， the forming limit was increased by 104%. Finally， the corresponding thickness and springback distributions were clarified， the maximum thinning rate is 10.3%.