Prefabricated components are more complicated than traditional cast-in-place components, due to the large workload of component splitting, too many types of components, and tedious modeling work. In addition, they contain a large amount of parametric information, which puts higher demands on the information application and management capabilities of BIM. To address the above problems, following the principles of parameterization, modularization, standardization, and engineering practicality, the present paper creates a parametric application for precast concrete composite slabs with rebar trusses based on Revit with the help of its built-in visual programming plug-in Dynamo. The application mainly includes three modules: intelligent batch splitting, batch parametric modeling, and intelligent export of dimension information sheets of precast concrete composite slabs with rebar trusses. At the same time, split component parametric information is integrated. Finally, the application is applied to a shantytown renovation project, which greatly simplifies the workflow of splitting, modeling, and quality inspection, and improves the efficiency of the design and construction phases.