Architecture Department of Central South University, Changsha 410075,China)[Abstract]Since the founding of the People's Republic of China, the industrial output of Chinese construction industry have been steadily improving, but some basic problems,such as low profit, low efficiency of Chinese construction industry haven´t been smoothed away radically. Based on the idea of expending service field and increasing the additional value of construction industry to promote the core competitive ability of Chinese construction industry, this paper has constructed the engineering value system of construction industry and has defined the concept of relatively additional economic value through the broad construction industry and the broad life-cycle of engineering project.According to the analysis result of Chinese construction industry situation, this paper has studied the increment characteristics of the additional value in different stages in the broad construction industry, worked out the smile curve of Chinese construction industry, and thus has predicted the future development direction for Chinese construction industry,and finally discussed the upstream, the middle reaches and the downstream as well as the whole development strategy in order to promote the core competitive ability of Chinese construction industry.