Abstract: Objective: The current design of Shanghai maglev train demonstration line has a maximum operational speed of 505 km/h. To adapt to the highspeed operation at 600 km/h, the configuration of existing normal conducting maglev traction system needs to be analyzed and optimized in design. Method: From the perspective of traction power supply system, based on the steadystate mathematical model of linear motors, the optimization direction for the 600 km/h highspeed maglev traction system is proposed without altering linear motor basic structure and parameters: i.e, increasing the output voltage and capacity of converter, as well as appropriately shortening the traction sections and stator segments. Based on previous engineering feasibility studies, an analysis of the relevant boundary conditions of the traction power supply system in the existing maglev system is conducted. It is found that the feeding cables and stator cables limit the input voltage and current of the existing motors, while the train length and the number of stator switch stations limit the length of stator segments. This further clarifies the principles for selecting key parameters of the 600 km/h highspeed maglev traction system and provides recommended parameters. A traction system is designed based on a straight track and traction simulation calculations are performed consequently. Result & Conclusion: For a 5car formation normal conducting maglev train, by appropriately reducing section length to 20 km and stator segment length to 800 m, and adopting a 32 MVA inverter, the train can reach an operating speed of 600 km/h after accelerating for 35 km.