Abstract:By taking the research object of the conical spiral groove aerodynamic bearings, the lubrication analysis mathematical model of bearings was established to solve bearing capacity and dynamic characteristic coefficients. The optimized mathematical model was established for the bearings of capacity, rigidity and stability. The optimized structure parameters of the bearing were obtained by solving the optimized mathematical model with using of the weighted minimax method. The results show that the weighted minimax method can be used to optimize the bearing’s structural parameters, not only can effectively solve the contradictory problem of each objective function, but also make the comprehensive performance further improved. The choice of weight coefficients affects the bearing’s comprehensive performance, and a reasonable choice of the weight coefficients can improve the bearing’s comprehensive performance.