Research conclusions ： Based on the detailed analysis on current situation, it is suggested to construct into Light Rail Transit (LRT) by modification and expansion of current railway resources, adding a flexible transit organization scheme, the utilization of existing railway in Sanya′s urban area is solved through technology methods. The results show that the LRT plan can not only fully utilize the existing railway resources，but also inaugurate a new tourism passage for the urban area and meet the commuting transit demands for the primary city and its supplement, by which this project can realize the object of maximizing the comprehensive transport capacity and environmental protection.