Research conclusions:(1)Given the effect of different jacking orders，the final deformation of railway subgrade caused by jacking is expressed as settlement trough form，with horizontal inclination angle around deformation region boundary line for 45 0 . ( 2)The subgrade deformation will occur at different locations in different times caused by different jacking sequences，with little difference between the final deformations.(3)The influence of pipe jacking on the railway is assessed according to the settlement of subgrade and the vector value of track’s short chord，and the simulation calculation results show that the maximum vector value of the track’s short chord does not exceed the requirements. (4)The settlement curve displays that the maximum settlement of subgrade surface has exceeded 10 mm，and thus grouting sleeve valve pipe results have value in safety for reinforcement can meet existing subgrade technology requirements. (5)The research evaluation and design of structures through railway without open excavation.