Abstract: Based on a vehicle-guideway coupling vibration model of maglev train, the equations of motion are obtained. A simulation program is designed to simulate the vehcile- guideway coupling vibration. The effects of suspension parameters, especially the restraint parameters of module roll, on the dynamic response are analyzed. The limit values of suspension parameters are determined, according towhich, suggestions are given to the design of the testing maglev vehicle of Qingchengshan.