It is of great significance to study the change of regional water use structure for regional sustainable water use and rational allocation of water resources. In this paper, water resources and water consumption data of Jiangxi province from 2011 to 2020 are selected to study the change rule of water consumption structure in Jiangxi province by using information entropy theory. The results show that:（1）the average annual total water resources from 2011 to 2020 is 170.317 billion m3;（2）In recent decade, the total water consumption in Jiangxi province shows an overall downward trend, whose industrial water consumption shows a downward trend, while the domestic water consumption, urban public water consumption and ecological environment water consumption shows an increasing trend;（3）In recent decade, the information entropy and equilibrium degree of water use structure in Jiangxi province are increasing, and the water use structure in Jiangxi province is further improved.