In order to improve the informatization and industrialization in the transformation and upgrading process from the traditional construction industry to the prefabricated building industry and promote the integrated development of the two. This paper develops a prefabricated building construction site information management platform based on BIM and IoT technology and closely connects BIM and IoT technology with the prefabricated building construction process. At the same time, actual engineering application results are used as feedback to realize the deepening of prefabricated buildings. The information connection and timely transmission of design-manufacturing-construction and installation have greatly promoted the industrialization of prefabricated buildings and promoted the in-depth integration of traditional building industrialization and information industrialization.