Prefabricated concrete buildings are the new development direction of China′s traditional construction industry, which has the advantages of saving resources, shortening construction period and improving quality. The traditional prefabricated building design method is to analyze the whole buildings and then to split the components, which is easy to cause complex types of components and management difficulties, and it is also not conducive to the improvement of industrial production efficiency and other problems. This paper develops a systematic and extensible components′ family management system by using the Revit extensible function and combining with.NET platform and the SQL SERVER database. The system will improve the management level of prefabricated components and the efficiency of component splitting and it will also provide scientific tools for the forward design of prefabricated buildings.