Abstract: According to Wuhu Zhongshan North Road underground passage foundation pit reconnaissance report, we raise foundation pit enclosure structure schemes of pile supporting and bracing as the foremost, taking mix-filled soil outside foundation pit with rather thick into consideration, setting grouting of water-stop curtain outside foundation pit support structures. Finally checking overall stability, the stability against overturning and uplift resistance of foundation pit by using the method of Sweden slice, Prandtl and Terzaghi theory. The research results show that the stability and uplift calculation meet security requirements and the foundation pit supporting scheme is feasible, the supporting method and the calculation method provide reference for the design and checking of the similar engineering.