A new type of damper buffer damping device is proposed to address the problem that the damping characteristics of ordinary hydraulic dampers are constant and the suspension performance of automobiles cannot be adjusted in time under extreme road surfaces. The article introduces the basic structure and working principle of the new damper buffer damping device, establishes the mathematical model of the damping, and uses ANSYS to establish a two-way fluid-solid coupling numerical simulation model, completes the analysis of the damping characteristics of the damper and the comparative analysis of the deformation amount of the valve sheet, and carries out the test verification of the damper. The data results show that compared with the common damper, the new damper buffer damping device not only increases the performance of the end buffer, but also reduces the deflection deformation of the valve plate, and prolongs the service life of the valve plate; finally, the experimental validation of the damper is completed by the oscillator, which proves that the numerical simulation of the new damper with bi-directional fluid-solid coupling has the accuracy, and the performance of the damper is better with the addition of the new damper buffer damping device. The performance of the damper is better with the addition of the new damper buffer damping device.