Abstract:Research purposes： Drainage design is the main content of the track system design. Especially because of the limitation of the underground structure，there are many difficulty of track drainage design，so the practical drainage effectiveness is not very well. If the wastewater cannot be drained in time， it may affect the safeness of the tunnel structure，track structure and the electronic equipments， furthermore it may affect the normal line operation. The propose of this paper is to research how the tunnel leakage water，washing wastewater and the fire fighting wastewater can be discharged to the pumping station，and then the wastewater can be discharged to the municipal wastewater channel under the premise of ensuring the safety of the track structure by using the limited underground structure and the line longitudinal slope. Research conclusions:(1) Based on the experiences，lessons of other projects and foreign test results and application example of high speed railway in China，the track system design methods and treatment measures of wastewater pumping station and the open section in the fat slope station，switch machine pit and ballast bed are proposed. (2)The research result is mainly used to track system drainage disign of urban rail transit.