Aiming at problems of deformation and stability in the construction of deep foundation pits of stations, the surface settlement deformation equal or less than 22 mm, the lateral displacement of soil equal or less than 20mm and the equivalent safety factor SSR were used as evaluation indicators to study the surface settlement deformation, the uplift deformation of bottom soil, the stability of support in the deep foundation pit, and evolution laws of deformation of continuous wall and soil behind the wall during the excavation of different deep foundation pits . Results show that deformation laws of surface soil caused by excavation of foundation pit are similar to "parabola", with the maximum settlement 0.5 mm. The maximum uplift at the bottom of the foundation pit is 23 cm, which mainly occurs in the silty clay layer and ends in the weathered granite layer. The supporting structure is mainly compressed, partially tensioned, and the overall stability is good. The middle wall in the long axis direction of the continuous wall is squeezed by the back soil to produce 1.25 cm deformation into the foundation pit. The maximum deformation of the soil at 2 m behind the continuous wall is 1mm, which is stable as a whole. Through the actual measurement of ground settlement and the comparison with simulation results, it is shown that numerical simulation results can better obtain deformation laws during the excavation of the foundation pit, and research results can provide useful guidance for the smooth progress of the construction.