There are many problems in the assembled building design and production process, which includes low degree standardization and poor data linkage. The idea of design for manufacturing and assembly (DFMA) in manufacturing industry was introduced, and the application of rapid modeling and refined designs of vertical precast concrete (PC) components in assembled buildings was coverd. Elements and its forming rules of PC components in a mass of blueprints of a major assembly building project was analyzed, which conducted by a construction enterprise. By analyzing the types, combination patterns, and data architecture of modules, design standards for modules have been formed. Design standards was integrated into building information modeling (BIM) software and develop corresponding tool software to achieve rapid modeling of modules. Based on the parameterized standard module created by software, the key technologies of association, matching, retrieval, combination, and disassembly were used to achieve the deepening design of PC components and the manufacturing connection of the factory. Finally, the test and comparison were carried out through practical engineering cases. The results show that the modeling speed of vertical PC components is increased by 70%, the deepening design efficiency is increased by about 80%, the deepening design cost is saved by about 80%, and the minimum manufacturing cost is realized. The research results are helpful to establish a standardized design and production system of prefabricated buildings, promote the design method of less specifications and more combinations, strengthen the data connection, and improve the comprehensive benefits of prefabricated buildings.