Abstract: In order to evaluate regional water resources sustainable ut ilization,the paper puts forward a new method on the basis of the fuzzy matter-element analysis and combined with the concept of Euclid approach degree,regarding the regional samples and the utilization phases as the object of mater-element and constructs the compound fuzzy mater-element with the evaluation factors and their fuzzy value of the object.Through calculating Euclid approach degree between the fuzzy matte-relement and the standard(the best)fuzzy matte-relement,the writer achieves on development and utilization phase of regional water re-sources and its optimum order,with the calculation of weight adopting the analytical hierarchy process method and the model applied to the evaluation of water resources sustainable utilization in Xi'an.It provides significant reference for sustainable development of water resources in Xi'an.