Abstract: Taking the deep foundation pit project of Xi′an metro station in the loess area as basis, model is established using FLAC software, and numerical simulation of the horizontal displacement features of deep foundation pit enclosure structure piles, ground surface settlement pattern, and steel support axial force changing pattern is carried out. Field monitoring results and simulation results are primarily in accordance. Research concludes that: adopting the combined support form of bored piles and internal supports for station deep foundation pit can effectively limit pile horizontal displacement and ground surface settlement. Timely set-up of steel supports can significantly limit the deformation of deep foundation pit and provide guarantee for construction safety.