Abstract:Taking 30 cultural relics and buildings of Mentougou folk houses as the research object, the study focuses on the architectural features of residential buildings such as quadrangles, Sanheyuan and irregular quadrangles in the mountains of western Mentougou District, by means of on-the-spot investigation, surveying and Mapping Records, combined with the technical description of local craftsmen, the basic structures and forms of such ancient buildings are sorted out, combined with the profound mountain culture and the family etiquette idea of the region to form the background of structural formation. By comparing the structural characteristics of the old Beijing hutong siheyuan residential buildings, the basic space law of the residential buildings in the area is preliminarily clarified in four main aspects: the foundation, the Big Wood, the wall and the roof, and further explore its basic structure, materials, construction technology and other features, for the further scientific protection and activation of the use of such cultural relics to lay a preliminary cognitive foundation.