Abstract: There are large number of ancient buildings in China, whose information archive is an important content in the protection of ancient buildings.The establishment of ancient building component information database based on BIM can be more efficient and effective to preserve ancient information.The reasonable standardization of component information is the basic of the information database can efficiently build.This paper studied the standardization of ancient building component information and the method for quantitative extraction of the key information, then to facilitated information reuse and the establishment of corresponding functions, improved the efficiency and function of ancient component information database.