传统的建设投资估算方法往往准确性不高,工程建设中常出现“三算互超”的现象。为提高建设投资估算的精确性,论文从建筑构件入手,拟从建筑部件成本汇总得出工程造价。参照对投资变化敏感的美国建筑分类体系Uniformat Ⅱ,并结合国内计价的定额体系,建立高层级的Uniformat与低层级的定额的混合体系。通过工程案例中得出混合体系Uniformat第一层次各主要元素单方造价,估算出新工程的建设投资;并与我国常用的综合单方造价估算出的建设投资对比,得出结论:引入Uniformat Ⅱ的分部估算方法比综合单方造价估算法更接近工程实际造价。 The traditional methods of estimating investment in construction are often not accurate, and often appear in construction projects. In order to improve the accuracy of construction investment estimation, the dissertation starts with building components and plans to conclude the project cost from the cost of building components. With reference to Uniformat Ⅱ, which is sensitive to the change of investment, combined with the quota system of domestic pricing, a mixed system of high-level Uniformat and low-level quotas is established. Through the project case, we get the unilateral cost of the main elements of the first level of the Uniformat system and estimate the construction investment of the new project. Comparing with the construction investment estimated by the common unilateral cost in our country, we conclude that the introduction of Uniformat Ⅱ The estimation method of the ministry is closer to the actual cost of the project than that of the unilateral cost estimation.