Maglev train realizes non-contact operation with the track through the action of electromagnetic force. As a core component, levitation magnet is very important for the vehicle system. In this paper, a new structure and power supply scheme for high-speed maglev levitation magnets is proposed. The levitation magnet coil is divided into the adjustment coil and the constant current coil. The adjustment coil is connected to the levitation controller. The constant current coil is connected to the constant current power supply. The circuit model and magnetic circuit models are established to analyze the power, response time and electromagnetic force of levitation magnet. The power loss and response time are used as the goal to obtain an optimization solution for electromagnetic turns and power supply. Finally, the finite element model was built to verify the feasibility of the scheme.