The pitched roofs of Chinese traditional dwelling have good ecological adaptability. Deeply research to find out the valuable technology helps energy-efficient building today. Through the study of the technology of draining, waterproofing, wind protecting, ventilation, insulation, dissipation and heat preservation applied in pitched roofs, the paper summarizes the changes of roof pitch, material and construction technique according to the climate. The objective is to provide new ideas and ways for energy-efficient building to achieve better ecological adaptability today.