In order to actively cope with the upgrading of global climate change, through the analysis and research on the key technologies of low energy consumption of green residential buildings in ancient villages of ethnic minorities in Southwest China, this paper expounds the key technology of low energy consumption housing design in traditional villages. From five aspects of “safety and durability, health and comfort, life convenience, resource conservation, environment livability”, the new edition of “green building evaluation system” is interpreted in detail. Based on the overall analysis of the ecological technology strategy of Chinese traditional villages, this paper puts forward some feasible design optimization strategies and measures with low energy consumption green technology for the short board of traditional houses. Finally, combined with the characteristics of traditional village residential buildings, the paper puts forward a green evaluation method combining qualitative and quantitative design elements of low-energy residential buildings. Combined with the current situation of ecological environment in China, a new design method of low energy consumption housing in traditional Chinese villages is developed by combining the characteristics of traditional wisdom and key technologies of green building. This paper introduces the feasibility of the method system, and provides reference for other ancient villages in the construction of new houses in the future.