Based on the finite element method,considering the nonlinear mechanical properties of the bearing material and the interaction between the various structural parameters,the contact analysis of the bearing was carried out.Orthogonal test method was used to analyze the influence of main factors such as cavity length,cavity number,helix angle,and the ratio of deep and shallow cavity on contact stress and deformation.Control variable method was used to analyze the influence of secondary factors such as the angle of the spiral cavity,the diameter of the inlet/outlet hole,and the depth of the spiral cavity on contact stress and deformation.The optimal values of each parameter were obtained respectively.The multiobjective optimization method was used to optimize the groove diameter of the bearing and the outer diameter of the liner to meet the design requirements of low stress and light weight.After optimization,the bearing mass is reduced by 29%,the contact stress is reduced by 12%,and the mechanical properties are significantly improved while achieving the goal of lightweight.