Abstract: Suspension rubber mounts deflection is studied when input signals frequency and amplitude are in different state. The final dynamic model is based on Bouc-Wen classic model; frequences and amplitude factor are also imported into the dynamic math model. The mount hysteretic nonlinear model is added into the linear vibration system, and the mount deflection time response is able to be calculated by using the vibration of bodywork obtained by linear system as input power. In the situation of sine excitation of same amplitude, the mount deflection amplitude is increased along with input frequency; the area closed in hysteretic curve is also increased along with input frequency, which means that the absorbed energy is increased. The suspension mount is helpful to reduce the vibration of high frequency.