Abstract: The technical difficulties and key technologies of large size thin wall sleeve's installation process in the hole of aluminum outer barrel of the aircraft landing gear shock absorber were deeply studied. After the analysis of the pressure equipment technology implementation process and the structure performance, put forward a way to use material heat bilges cold shrink performance by means of heating of cryogenic transform drum, barrel, a dedicated research and development and manufacture of automatic equipment for rapid and accurate positioning installation being connected in the advanced manufacturing technology, breakthrough the key technology bottlenecks, determined the implementation plan of reliable, got the pressure equipment parameters, developed the corresponding technology and equipment, has realized the low stress or no stress resistant liner buckling deformation being connected, formed a stable and efficient product realization process. It also provided a reliable solution for reducing the wear and tear of the inner hole of the aluminum outer cylinder of the landing gear buffer and improving the product life and good maintenance performance of the landing gear.