In modern urban developing process, due to the influence and restriction of historic and economic factors, many historic districts are facing problems such as lack of widespread traditional style building conservation, poor micro-climate conditions, and low living comfort level and so on. Under the trend of increasing attention to the protection of the historic district’s traditional style, the poor micro-climate living conditions fail to be significantly improved. Therefore how to properly combine protecting the historic district’s traditional style and improving the micro-climate becomes a serious problem to be solved, so as to achieve the aim of keeping the historic district’s traditional style and stimulating the vitality of the micro-climate environment. This paper takes the case of Xi’an Sanxuejie Historic District, and studies possible solutions to integrate traditional style’s protection and improvement of micro-climate. Through fieldwork and data collection, the author provides suitable micro-climate improving methods for the traditional courtyard. The purpose is to offer new methods to achieve sustainable development of historic districts.

Xian Sanxuejie district is a typical historic district of the city. Presently this type of traditional districts is surrounded by many modern buildings due to the rapid urban expansion. The historic districts are facing problems of poor courtyard micro-climate conditions and low living level, which has become the bottleneck of historic districts sustainable development. This paper studies thermal environment, luminous environment, solar environment and wind environment from a new perspective using Ecotect building environment analyzing software. The author explores micro-climate improving method suitable for traditional courtyard in order to promote micro-climate quality of historic district and to improve the comfort of local residences. The purpose is to achieve sustainable development of historic districts.