The main circuit of the suspension controller for low and medium speed maglev trains is studied and a mathematical model of the charging circuit and chopper circuit is developed. A simulation model of the suspension controller main circuit is established using the dSPACE real-time simulation software and hardware platformand the charging circuit and chopper circuit as well as the current tracking situation are verified and compared. The simulation results show that the simulation model of the suspension controller main circuit established is more accurate. A theoretical basis is provided for the subsequent replacement of the real suspension controller main circuit by the simulation modeland the foundation is also provided for the development and debugging of the suspension control strategy.