Abstract:This research categorized and organized a substantial number of materials as well as images of northern China dating back from the era of Northern and Southern Dynasties to the Sui Dynasty, which expanded the existing samples accumulated from previous research and paved the way for summarizing as well as analyzing the evolution and characteristics of structures under the eaves during the Northern dynasties. By focusing on the correlation among eave columns, longitudinal frame, and transversal frame, five relationship categories and characteristics were deduced. The samples could then be sorted out by time, region, and construction features, from which a preliminary result of the evolution of wooden structures under the eaves was acquired during the Northern Dynasties. The results show that the complexity goes beyond that in previous researches, and those major technical features can be explored in the northern region during the Northern Dynasty.