The deformation rule of retaining structure was analyzed by according to the field monitoring data. Numerical simulation calculations were carried out by using finite element analysis software being PLAXIS and the numerical simulation results were compared with actual monitoring date. The results showed that moment of underground continuous wall obtained from finite element model met with actual situation. The deep horizontal displacement curve appeared as parabola being middle part and small at two ends. The maximum displacement located nearby excavation face and the increased with the increase of excavation depth. The transverse brace could effectively decrease the moment of underground continuous wall. The effect of concrete support was more obvious. The tensile region of underground continuous wall was affected mainly by excavation depth and less support structure.