| In our current urbanization, hundreds of buildings were demolished. The rate of reuse-recycling building materials was very low because of lack of the related studies. It is becoming more apparent that the demolition is disserving the natural resources and energy, and can not be sustained, either economically or environmentally. This paper established a strategy system of reuse-recycling of building materials based on the circle economy as the aim was to protect the environment, to save natural resources, to reduce energy consuming and to accelerate urban development. The study firstly analysed building system of life cycle assessment and enumerated the policy, the course and the related studies. Building components reuse studies applied several methodologies, included life cycle assessment, model induction, economic system analysis, etc.The paper presented three aspects of the technology of building deconstruction and components reuse:1) During bibliography data collection and analysis we have had a general overview about the important function of circle economy and a series of representative cases in our coutry and foreign countries.2) The technology system was composed of selective deconstruction for reuse-recyling and design methods. Above all, deconstruction is the most difficulty part.3) The economic and social value of reuse system were quantified which used the Chinese building block in a life cycle perspective.In order to reduce the environmental impacts within the building sector, an understanding of reuse-recycling of building materials should be needed.Although there were so many advantages that reuse of building materials, it was received inadequate recognition and support of the government interiorly. The significance of this paper is attaching importance to reuse of building materials which will redound to sustainable society. Furthermore, this paper brings suggestions to future architecture design through the studies of building deconstruction.
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