Abstract: The paper discusses the application of continuous contact force model in the process of collision between a typical buffer structure and bearing components. The differences between compressible fluid hydraulic buffer model and incompressible fluid hydraulic buffer model are compared. Combining the continuous contact force model and two kinds of hydraulic buffer model respectively, a comprehensive calculation and analysis method was studied, and the calculation results were compared with the experimental data. The combination of continuous contact force model with compressible fluid model is more suitable for the piston hydraulic buffer structure.