The change trend of water quality monitoring data in nearly 26 years in Dongbei Hydrologic Station,Jian Hydrologic Station and Xiajiang Hydrologic Station was analyzed in order to study the characteristic of water quality change in Jian reach of the middle stream in Ganjiang River.The results show the trend of water quality change of Jian reach in the middle stream of Ganjiang River isn't obvious under the background of accelating urbanization.Though water quality is good,the existing problems is that temporal and spatial distribution of rainfall is uneven,the storage capacity of hydraulic projects is low,seasonal,engineering and water quality water shortage has occurred and water pollution incident has occurred.In order to protect the water environment of Jian city and ensure the sustainable development of economy and society and based on water ecological environment protection,the relevant measures and suggestion are proposed from reducing agricultural pollution and treating industrial pollution and domestic pollution.