An index system of integrated evaluation with eight indexes and the five items of sociality,resource, economics,technique and ecologic environment is established by using the fuzzy comprehensive evaluation method. The system is combined with the execution of water saving improvement of the Guanzhong irrigation districts.In addition,an integrated evaluation model is constructed.Evaluation comments are divided into the four grades of low benefit,general benefit,good benefit and very good benefit.The integrated evaluation value can be obtained by the fuzzy analysis and calculation.After water saving improvement,integrated evaluation index of the Guanzhong irrigation districts raises a grade,that is,from the general benefit to good benefit.