Research conclusions :(1) Based on the analysis of the various types of traction，it is recommended to use the electric locomotive. (2) Based on the analysis of the railway function orientation and the features of the traffic volume， it is recommended to adopt the balanced gradient scheme. Namely，the 6 ‰ limited gradient will be used for the heavy - haul direction and the 22‰ limited gradient will be used for light - haul direction. (3) In order to meet the demands of the tractive tonnage and the traffic capacity of this railway，it is recommended to use SS7 locomotive with the tractive tonnage of 3000t on consideration of the coordination with the adjacent railway network and making full use of the maintenance devices. (4) The demonstrations of the traffic security and the adaptability of the traffic organization show the main technical standards used for this railway are good in the operation and saving the construction investment. (5 ) The research result can be as the basis for the selection of the main technical standards for the mountain railway with the complex topographical conditions.