Abstract:As the epitome of traditional architecture, pavilion architecture in Lanzhou not only has the typical characteristics of the carpentry work construction system, but also has the unique construction technology of this kind of architecture. Through field investigation and craftsman interview, this paper analyzes the corner position, members between columns and top of the lower frame timber structure and upper frame timber structure of the pavilion, so as to clarify the various structural load-bearing modes of the pavilion, then clarify the differences between Lanzhou Pavilion buildings and surrounding and official buildings,finally extend the structural type to the unity with the roof truss in the form of "steep as a mountain and flat as a river", and explore the unique construction logic of Pavilion buildings in Lanzhou from "component-structure -form". Therefore, the theoretical system of carpentry work construction of traditional buildings in Lanzhou is further improved from the research of building types.