摘要：The minimum curve radius is one of the most important factors in railway route design. The minimum curve radius of the Hainan East Ring Railway, a newly built high-speed passenger-dedicated line from Haikou to Sanya, Hainan, China, was determined through comparative analysis of the design codes both in China and Germany. The results show that the design parameters of the Hainan East Ring Railway in terms of the minimum curve radius determined by China＇s Temporary Regulations, conform to the ones by German code, and even preserve some capacity for speeds up to 300 km/h in the future. Additionally, the related counter- measures for speed increases in this line were proposed on the premise of the safety and riding comfort of the trains.