Total water pollution control is an important link in the process of regional water environment governance.Taking the improvement of river water quality in Dongxin Farm as an example,this paper systematically analyzed the generation and discharge of different types of pollution in the region,combined with the accounting results of water environment capacity,and obtained the reduction of control indexes in different time and space.The results show that agricultural non-point source and domestic pollution are the main pollution sources in this area.The water environment capacity in flood season is greater than that in non-flood season,but the pollutant reduction in flood season is also greater than that in non-flood season.The main pollution control areas are the southern zone of Zhonggan River and the middle zone of Donggan River.The reduction rate of CODCr is 20.3% and 44.7% respectively,and the reduction rate of total phosphorus pollution is higher than 30%．