Abstract: The floating plate vibration isolator is mainly to realize the shock absorption effect of the track bed, and is composed of components such as sleeve, cover plate and bearing, which can form a whole with the floating plate structure pouring. In order to ensure safety and reliability of the floating plate isolator structure under the actual working conditions, this paper uses the finite element analysis software ANSYS to establish a physical model of the floating plate isolator, and studies the stress change and deformation of the floating plate isolator when the vehicle passes through the track. The simulation results show that the floating plate isolator meets the strength and stiffness requirements, which can provide a reference for the design and safety of the actual floating plate vibration isolator.