灌溉工程设计标准选择灌溉工程设计标准常采用经济分析方法进行比较选择，笔者建议采用财务动态分析法，要求灌区内部回收率必须大于１２％，净现值必须大于０，其财务分析基本参数包括不同灌溉保证率的灌溉面积、灌溉工程投资、作物多年平均减产系数、灌溉效益、灌溉工程... Irrigation engineering design standards Selection of irrigation engineering design standards often use economic analysis methods to compare the choice, the author recommends the use of financial dynamic analysis requires that the internal irrigation rate must be greater than 12%, the net present value must be greater than 0, the basic financial analysis parameters include different Irrigated area of ​​irrigation guaranty, Irrigation project investment, Multi-year crop yield reduction, Irrigation efficiency, Irrigation project ...