Protection and inheritance of construction technology wind and rain bridge based on BIM technology

With the continuous advancement of the protection process of intangible cultural heritage, the protection and inheritance of the Wind \& Rain bridge of Dong Nationality in Sanjiang, Guangxi, as one of the key symbols of the intangible culture of construction technology of the Dong wooden architecture, has received corresponding attention, but it is facing many difficulties and challenges under the rapid social evolution of digital development. In this paper, BIM technology is integrated into the protection and inheritance of the Wind and Rain Bridges, through indepth research and coordination of data collection, building description, digital modeling, information integration and int eraction of Wind and Rain Bridges, it provides thoughts for the protection and inheritance of wooden construction cultur e of Dong minority in Sanjiang.