Abstract: In order to improve and perfect the 3D real scene of traditional villages so as to achieve the purpose of inheriting and protecting the endangered ethnic buildings in traditional villages. Relying on the component level 3D real scene project of traditional villages in Guangxi, this paper uses the oblique photogrammetry to build the urban level 3D real scene of traditional villages, and uses the close photogrammetry and BIM to build the component level 3D real scene model of highly endangered ethnic buildings. The component level 3D real model map of traditional villages is a combination of oblique photography model and close photogrammetric model. According to the relevant information of the endangered ethnic buildings, including the appearance characteristics of the components, size information, endangered level, age and geographical location, this paper uses BIM technology to carry out parametric modeling, coding and warehousing, forming a searchable 3D real model database.

Key words: 3D real scene, endangered ethnic buildings, close to photogrammetry, BIM technology