Excavation of deep foundation pits in the central area of the city often affects the surrounding environment. Therefore, it is vital to select the appropriate supporting structure during the excavation of the foundation pit and to do the information monitoring of the surrounding environment. In order to study the influence of foundation pit excavation on the surface settlement of adjacent roads in the urban area of soft soil area, the deformation law of the top of the retaining structure, the trend of the axial force of the inner support and the influence of the inner support on the surface settlement of the road and the deformation of the top of the enclosure, Taking the deep foundation pit engineering of Shanghai Taojiazhai as the background, through the horizontal displacement of the top of the retaining structure during the excavation of the deep foundation pit, the vertical settlement; the surface settlement of the adjacent road; the internal support axial force for information monitoring, and the measured data was carried out. analysis. The results show that the change rate and final displacement of the horizontal displacement of the retaining structure at the middle of the foundation pit are larger than the corresponding values of the retaining structure at the pit angle, and the difference is large. The surface of the adjacent pit near the road is not settled by a single settlement characteristic under different processes, but different features alternately appear. The B2 section changes from the triangular shape to the groove shape after the first support is removed. The inner support can better restrain the top deformation of the retaining structure and the settlement of the road surface, and shorten the exposure time during the excavation to add support in time. The deformation and settlement in the middle of the foundation pit are greater than the deformation and settlement at the corner position., and the position should be protected during construction.