In this paper, an adjustable rail of small radius curve with serious wear on the LonghaiLine is selected as the research object to conduct personalized grinding scheme design. The geometrical contact state of wheelrail is analyzed, and the dynamic simulation of vehicle-track multi-body system is established. The results show that: the rail surface of the adjustable rail, the rail surface light belt, rail wear rate and the track quality index TQI are significantly improved after grinding. Through the geometric analysis of wheel-rail contact, the equivalent taper and wheel-rail contact point are optimized after grinding, and the train operation stability and wheelrail contact state are improved. Through the dynamic simulation of vehicle-track multi-body system, the maximum wear power, the maximum wheel weight reduction rate and transverse acceleration of the vehicle body are reduced, and the wheel-rail wear characteristics, train operation safety and stability are improved.