Based on the principle of finite element method on elastic foundation,using equivalent model of winkle beam on elastic foundation,a computing program has been programmed by turbo C.And modular simulation is adopted for simulating different factors to affect the excavation.The analysis is based on elasticity method.Considering its drawback,the deformation and the axils force are modified in the solving progress which is for simulation the affect by the deformation of the reforcing system.Combine with analysis of the excavation of the station of Neng-Jiang road,it is found that the result is coincided with the field testing value which shows the applicability of the method.And also,it could be referenced by the 3-D FEM analysis.