Abstract:The foundation is not only related to the safety and durability of the superstructure, but also has a very important role in the use of the overall structure. The calculation methods of several ultimate bearing capacities of foundations and the calculation theory of foundation deformation in the design specifications are briefly concluded. At the same time, the adverse effects of groundwater on the effective stress of soil are summarized, and the key points that designers should pay attention to in the process of foundation design are put forward.