Research conclusions: The infrastructure maintenance base of passenger dedicated line should be designed on consideration of the whole railway network in China． The distribution and functional orientation of the base should be chosen reasonably． The base site should be selected on the premise of meeting the requirements of the railway plan． The comprehensive decision should be made on consideration of the various factors to reduce the impact on the environment． When making the general layout design of the base，the layout should be reasonably compact without disturbances of various production and maintenance processes each other and the design of various pipelines should be improved with the reserved condition for future．