The importance of preserving traditional architecture lies in its cultural, historical, and architectural significance. Traditional buildings often reflect the unique identity, craftsmanship, and historical context of a community or region. Traditional architecture is an integral part of a community's cultural heritage. It embodies the customs, traditions, and values of a particular society. Preserving traditional buildings helps maintain a connection to the past and allows for the transmission of cultural identity to future generations.Many traditional buildings have historical significance, representing specific periods, events, or architectural styles. Preserving these structures contributes to the understanding and appreciation of history, providing tangible links to the past. In summary, the preservation of traditional architecture is crucial for maintaining cultural continuity, understanding history, fostering architectural diversity, sustaining local economies, and promoting a sense of community identity. It contributes to the overall enrichment and well-being of societies around the world.In this study, a BIM model of the bucket arch structure in traditional Chinese architecture is established through the use of parameterized design. The fundamental components of the bucket arch structure are generated by coding in GDL. Subsequently, several models of the bucket arch structure are completed through assembly, resulting in the creation of a visualized representation of the bucket arch structure.By constructing a model of the Dougong structure, it can provide assistance in the maintenance and management of traditional buildings. Additionally, it has an impact on the preservation of data related to traditional architecture and the establishment of subsequent databases. Furthermore, the model allows people to intuitively understand the composition of traditional buildings, offering educational benefits as well.