This paper probes into the BIM-based integrated design method for prefabricated buildings in China, by taking the Building 20# of RK Songshan Residence Project in Qingpu District, Shanghai as a case study. The paper summarizes the workflow of the project design phases, and checks how BIM technologies help efficiently complete design tasks of various phases and achieve multi-disciplinary coordination and refinement design deliverables, which is expected to have referential value for Chinese enterprises to implement BIM technologies in the design of prefabricated building projects.