Abstract: Based on the idea of parametric design and the Application Programming Interface (API) of Revit, this paper applies the mathematical theory of semi Weaire-Phelan (WP) polyhedron for the secondary development of Revit to achieve the parametric modeling plug-in for semi WP polyhedron. Through the plug-in, users are able to achieve the modeling and type selection of theory of semi WP polyhedron, as well as the modeling of basic combinations, by using the form program and controlling parameters. Practical case studies have verified the correctness of the application of this program in the type selection progress of semi WP polyhedron. The study results can be directly applied in the BIM model to generate spatial structures with polyhedrons.