Rubber antivibration components are an essential part for industrial applications. The simulation on their dynamic response is a complex procedure, especially using three-dimensional solid models in time domain. Instead of using the usual viscoelastic methodology, as results from different viscoelastic models may vary widely and to avoid complex parameter fitting procedures, we have performed a dynamic impact simulation on a pair of rubber mounts based on the NFR (NFR-Natural Frequency Region) method that takes into account the large deformation and high damping characteristics of rubber structures. During an impact test, a 250 kg impact mass was dropped on to the rubber springs and the deflection response was recorded. The rubber mounts were simulated using three-dimensional solid elements instead of simplified spring/dashpot elements. Natural frequencies and eigenvectors were calculated and in reference to the damping ratio from a tripsometer experiment. The simulated results were compared with the experimental data in time-domain and a good agreement was observed. This report is to present this simulation procedure in detail. The work may provide a reference for the relevant work and help to more accurately simulate the dynamic response of the rubber antivibration systems.