Connotation of water-saving irrigation was elaborated, and the factors of water-efficient irrigation developing were analyzed.Three items of sub-indices of engineering,agriculture and management water-saving were adopted. Firstly, main ingredients with thirty-three indices of the sub-indices were extracted to reduce the number of evaluation indices and establish index system of regional water-saving irrigation developing level evaluation model.Secondly,combination weights were formed from both of objective weight determined by entropy weight method and subjective weight determined by analytic hierarchy process method.Finally,the set pair analysis was selected for analysis.The evaluations showed that two regions are of general,seven regions are of relatively poor,twelve regions are of poor,and the rations of them in all regions are 9%,33% and 58%,respectively.The results indicated that water-efficient irrigation developing level of every region is still lower,and the overall of Sichuan province is evaluated with level of poor.Therefore,the model has a strong practicality to evaluate the water-saving irrigation development in different regions.
