There are two difficult problems for the development of fabricated buildings-how to carry out rapid design, modeling and modular split design under the constraints of design codes. Based on the study of related design codes and parametric design methods of prefabricated components with information technology such as BIM, it is shown that BIM could have a significant effect in the application of prefabricated-component design. The application of BIM can not only realize the parametric, modular design and modeling quickly, but also extract the designers from mechanically repeated work for designing and modeling, save plenty of time cost.