Abstract: In order to research the dynamic performances and running feasibility of a vehicle with MRF(magnetorheological fluid) coupled wheelsets at super-high speed,a spatial curve passing model for a holonomic vehicle with MRF coupled wheelsets and anti-hunting dampers was established based on the MRF biviscous constitutive relation.The simulation result shows that under the condition of a small MRF yield stress,the vehicle will hold higher critical velocity,but wheel/rail two-point contact appears easily.Vehicles with MRF coupled wheelsets and anti-hunting dampers may possess a good super-high speed curve passing performance under the conditions of given suspension parameters,a suitable MRF yield stress and anti-hunting damp.