The water pollution is becoming increasingly serious,and water ecology is being deteriorated,thus drinking water source protection situation is becoming more and more serious in Zhousan.In order to solve the above problems,taking the water source protection and management technology research of the Chengbei reservoir as an example,the water quality and pollution sources of the Chengbei reservoir water source are comprehensively analyzed,and the corresponding measures for water source protection are put forward,including the reservoir sediment dredging,ecological remediation in the reservoir region,river improvement.With these measures,it is predicted that the reservoir water quality can meet the requirement of class Ⅲ standard of water environmental function zoning and the reliability of water supply can be improved greatly.