The work aims to apply the finite element analysis technology to static stacking and dropping impact prop-erties analysis and optimization design of air-conditioner package. With the application of finite element analysis software, the finite element model of air-conditioner and cushion was built. The situation where packages were subject to de-formation and stress in static and dynamic state was simulated. Optimization design of the width and length of the long smooth groove of the cushion was carried out with the minimum volume of the cushion as objective function and the maximum stress and deformation value of the cushion and air conditioner as the boundary conditions. After the static pressure analysis, the maximum deformation of the cushion was 0.97 mm, and the maximum static stress of the package was 1.56 MPa. After drop analysis, the maximum acceleration of air conditioner was 493 m/s2, the maximum static stress of air conditioner shell was 2.3 MPa, the maximum stress of the cushion was 1.12 MPa, and the strain of the cushion was 0.6%. After optimization analysis, the groove width and length were 26 mm and 141 mm, respectively. The analysis showed that the design of the cushion met the requirements of cushioning protection. Through the simulation analysis and optimization design, the size of the cushion structure can be improved, which saves materials while protecting the product effectively. It can satisfy the lightweight design needs of transport packaging.