| The construction project economic evaluation is an important part of the feasibility study of the project, the economic evaluation of the construction project, including preliminary economic evaluation of the project, the evaluation of the implementation phase of the project construction management, and project economics after evaluation. This paper, with reference to the Ministry of Water Resources, water conservancy construction project economic evaluation norms "key counties for projects of small-scale irrigation (smallholders water) baoying economy after evaluation. After the economic evaluation of the water conservancy project, including aspects of the socio-economic, financial, engineering, environment, management, social, immigration and conclusions. Due to the special nature of small-scale irrigation and water conservancy projects as well as the results of the field research, we did not consider the time to do the project economic evaluation immigration factors.China is a large agricultural country, the level of irrigation and water conservancy facilities have a significant impact on China’s agricultural production and food security.2005, the central financial subsidies for the construction of small-scale irrigation and water conservancy special funds for projects to commence in2009, the Ministry of Finance, Ministry of Water Resources raised key counties and special project of the implementation of small-scale irrigation (small farmers water), and give special subsidies. Baoying County, Jiangsu finalists focus on the construction of the county, Jiangsu Province, the first batch of small-scale water. With the completion of the construction of the first batch of key counties Engineering, retrospective assessment of the project has been built, sum up experience in building, learning lessons and improve the level of decision-making and investment benefits of the project are also becoming increasingly important.The main object of this study is baoying small irrigation and water conservancy key project. In the economic evaluation for the project, the first analyzes the general method of water conservancy project economic evaluation and related laws and regulations. And then mainly introduces the general situation of baoying, including baoying geology, hydrology, climate, topography, and of social and economic development situation and the status quo of baoying county water conservancy project. The focus of this study is to baoying small-scale peasant economy after water engineering evaluation, national economic evaluation research. According to baoying water department to provide the data, analysis and calculation for this project according to relevant industry standards can be monetized benefit and national economic evaluation index, the amount and the amount of expenses through analyzing the index of economic evaluation conclusions. At the same time, the analysis pointed out that the objective of the uncertain factors, fully consider its influence degree, selecting important influence factors on the national economic evaluation, sensitivity analysis and the project national economic evaluation of the final conclusions. Finally in this paper, the small-scale water baoying key has carried on the social benefit evaluation of the research project, including the social evaluation and environmental assessment; Paper finally to baoying key county of small-scale water has carried on the comprehensive evaluation of engineering projects, and gives the relevant policy recommendations. |