The 3D rebar modeling in Revit has been a difficult problem for the designers in the deepening design of prefabricated building component.This paper presents a parametric rebar modeling method for prefabricated building componentthrough the research on the arrangement ruleof rebar.Based on the rebar modeling method and Revit secondary development technology, a set of design-aided software is developed.It is proven through engineering applications that this method can effectively reduce the work load on rebar modeling, which saves a lot of time and money.This method can be used as a rapid modeling reference of 3D reinforced prefabricated construction design.