In order to solve the problem of seismic design of continuous beam bridge in which the longitudinal seismic inertia force is only carried by the fixed pier， the seismic potential of the movable pier is fully exerted with the same section as the fixed pier.Based on the principle of wrap rope， the mass rotation wrap rope device excited by additional mass inertia force is developed to real?ize the cooperative force of fixed pier and movable pier and limit the relative displacement of beam end. Based on the working principle and structural characteristics of the device， the restoring force model of the device is proposed， and through a 3-span regular continuous beam bridge， the finite element model of the whole bridge is established. The effects of additional mass， friction coefficient and initial relaxation coefficient on the vibration reduction performance of continuous beam bridge are systematically analyzed.The results show that the effect of mass rotation wrap rope device on reducing the seismic response of fixed pier and lifting the movable pier to participate in the longitudinal whole cooperative force of continuous beam bridge is obvious. The influence of parameters of different seismic wave input characteristics is slightly different， but reasonable design parameters of the device will produce a more obvious effect of shock absorption.