The reinforcement design of precast components is a key step in the detail design process of prefabricated buildings, and the existing BIM precast components deepening design software is difficult to meet the actual needs of use. This paper proposes a new prefabricated component modeling method. With the standardization of steel bar design, it combines with object-oriented software development methods to develop a prefabricated shear wall component reinforcement design software based on Revit, and obtains application verification in engineering practice.