According to the monitoring data packets Suzhou Metro Line Creek Road Station, the excavation monitoring data obtained during excavation was analyzed, it is found that there exhibits similar changes even wall parabola with significant temporal effect law;when the base plate and the structure of the beam plate are formed, the structure of the retaining structure is effective. With the increase of excavation depth, the surface subsidence increases, the form of settlement in the field is "settlement trough". With the increase of the weight of the structure, the elastic zone of the base plate is limited and a small amount of compression deformation is generated, and the whole wall of the earth wall is sinking, and the end is stable. The longer the envelope of exposure, the greater the change in the pit of ground settlement, it is found the steel support axial force is not monotonically increasing or decreasing, but the state changes repeatedly leaping forward, which is consist with the construction process, temperature changes, strut stress factors.