In order to solve the problems of dynamic response and structural vibration suppression of aircraft bevel gear thin-walled spoke plate, an optimal design scheme of damping pass structure was proposed. Taking a certain type of aeronautical spiral bevel gear as an example, the model of spiral bevel gear was established. The natural characteristics of the gear were calculated by Lanczos method, and the frequency margin between the first six natural frequencies and the excitation force was analyzed. The dynamic response characteristics of radial plates with different holes and their suppression effect on vibration transmission were studied by means of modal superposition method. The parameters of radial plate pass structure are optimized by orthogonal experiment design and simulation analysis. The results show that under the condition of the same area and the same number, the vibration responses of triangle, round, pillow and waist shapes decrease in turn. The optimized waist pass can effectively suppress vibration transmission and improve the smoothness of bevel gear transmission.