Abstract: In order to study the impacts of production wastewater recycle in water purification process,the performance data of production wastewater recycle process were compared at BW drinking water treatment plant. On the basis of flow and material conservation,the pollutants were removed by water purification system and were discharged by the exclusion of mud cake. Through the testing of the water quality indexes,wastewater recycle would not make adverse impact on the water quality of low turbid raw water treatment,and the metals,trihalomethanes,and polyacrylamide would not get enrich. Due to the presence of large numbers of colloidal particles,broken floc and incomplete reaction flocculants,humic acid and other substances in wastewater,coagulation will be enhanced and water quality will be improved after mixing with raw water. The results show that the wastewater recycle process can save water resources,enhance the low turbidity water coagulation effect,and have little effect on the safety of plant effluent water quality.