针对节水灌溉项目决策信息不能准确获取的问题，利用三参数区间数对节水灌溉项目进行评价。通过改进熵值法计算属性的权重，综合利用TOPSIS法以及灰色关联算法计算不同方案的相对贴近度，利用相对贴近度的大小对方案进行排序，并将算法应用到节水灌溉项目优选实例中，结果证明了算法的有效性和合理性。

In view of the problem that the decision-making information of water-saving irrigation project cannot be obtained accurately, the three parameter interval number was used to evaluate the water-saving irrigation project. The improved entropy method was used to calculate the weight of attributes, the TOPSIS method and grey correlation algorithm was used to calculate the relative closeness degree of different schemes, the value of relative closeness was used to sort the schemes, and the algorithm was applied to the optimization of water-saving irrigation projects. The results verified the effectiveness and rationality of the algorithm.