Abstract: The vehicle-rail coupling is one of the most critical issues affecting the safety and comfort of maglev vehicles. A high-speed magnetic levitation vehicle-rail coupling experimental platform is developed and constructed to study the suspension stability at high speed. The structure is designed based on the actual electromagnet module of the maglev vehicle and the rail module, which is connected to an external exciter to simulate various rail conditions at different speeds and irregularities. The control system is modified based on the real maglev controller, chopper and sensors, and the DSPACE rapid control prototype technology is applied to monitor and modify the embedded algorithm online. A corresponding multi-body-dynamic co-simulation model with flex rail is established, which is convenient to quickly simulate the suspension stability under different control algorithms and mechanical environments. Finally, the actual real-time control performances of suspension were tested at low, medium and high speeds. Experiments showed that the platform could carry out high-speed vehicle-rail coupling tests, which provides a reliable equipment basis for the study of the vehicle-rail coupling vibration and optimization of the high-speed control algorithm.