To date， the commonly used BIM software lacks foundation pit engineering related families， making it difficult for designers to create complex foundation pit models. Based on Autodesk Revit software， this paper supplements and develops Revit families related to foundation pit engineering， and tries to provide convenience for designers to apply BIM technology in foundation pit engineering. The foreign family of foundation pit engineering is constructed， the design and creation of foreign family models are carried out， and a plan is proposed for model construction and construction process simulation for various stages of foundation pit engineering . Relying on the actual project， the families developed in this paper are used to create the foundation pit support model， and the feasibility of the modeling scheme is verified. Finally， the simulation of the foundation pit construction process is realized via the Fuzor software. The result shows that BIM technology can be better applied to foundation pit engineering by the developed Revit families.