With the development of social economy and the implementation of the most stringent water resources management system，the contradiction between supply and demand of water resources has become a key factor restricting the social and economic development of Jiangxi Province.Improving water use efficiency is an important problem to be solved at present.Based on this problem，using the data of Jiangxi Statistical Bureau and Hydrological Bureau，this paper establishes an evaluation system for 11 cities in Jiangxi province，taking into account the selection of water consumption per capita，water consumption per 10,000 yuan GDP and other indicators.CRITIC-TOPSIS method is used to evaluate water use efficiency in Jiangxi province，in order to provide reference for improving water use efficiency in Jiangxi province.The evaluation results show that the water use efficiency of all cities in Jiangxi province is on the rise.The water use efficiency of Jiujiang，Shangrao，Ganzhou and Pingxiang is higher，that of Ji'an，Fuzhou and Nanchang is general，and that of Yingtan，Yichun，Xinyu and Jingdezhen is lower.