Research conclusions:(1)Ganzhou-Longyan Railway Reconstruction Project is located in the mountainous areas of Fujian and Jiangxi Provinces，topographic and geologic conditions are very complex. Taking full account of the length of the line，in the case of project investment, combined with the use of the existing line，the engineering geological conditions，construction difficulty，project risks，local regional planning and long-term development，the economic rational line selection works are the main features of this line.(2) Expansion reconstruction project should be as close to the existing railway corridor, easy access to both the station and the station layout with fast, general and breakout speed station program，can take advantage of the existing station building and equipment to facilitate the transport organization and management，save space and reduce local municipal facilities construction. However in some existing lines of low standard and arched linear location，combined with the economic base through a comprehensive comparison of the line than the election and engineering economics, the cut-bend program should be adopted which is combined with local urban developing plan and sets up the new station. (3)The line selection on the detail line position mainly considers engineering geological conditions, construction difficulty and risk，and uses the project feasibility as the main evaluation index. (4) The method of line selection can combine macro and local，general and detail which can subject the line program to the overall，make specific projects safe and economic，technical solutions reasonable，on-site construction feasible. (5) The result can be used as a simple reference for other mountain railway survey and design.