Abstract: Introduced monitoring process of deep foundation pit by SMW pile enclosure structure in Shanghai,and combined with the design and construction technology of retaining structure and the surrounding environment of the deformation are analyzed.Including deep horizontal displacement of the enclosure structure,axial force,uplift and settlement of column in pit,changes about waters out of pit,characteristic of settlement about buildings.The results showed that:adopting reasonable technology of construction according to the design scheme can effectively control the deformation of the retaining structure and the surrounding environment in the smaller range of values,for the soft soil region using SMW pile for Deep Foundation Pit enclosure structure design corresponding accumulation of experience for the similar parameters,construction of deep foundation pit excavation technology provides a reasonable choice reference.