建国以来，中国建筑业产值一直稳步提高，但低效率、低收益问题仍然没有得到解决。基于拓展服务领域、增加附加价值以提高我国建筑业核心竞争力的思路，从“广义的建筑业”和“广义的建设项目生命周期”出发，构建了建筑业的工程价值体系，并定义了相对附加经济价值这一概念。根据对目前我国建筑业现状的分析结果，研究了建设项目生命周期各个不同阶段附加价值的增值特点，做出了我国不同时期建筑业的微笑曲线，预测了我国建筑业未来的发展方向，最后探讨了提升我国建筑业核心竞争力的上、中、下游和整体发展战略。

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.