Theearthiscoveredbywater,buthumanscanbeusedfordrinkingwateractuallyoccupiedmuch,onlyrivers,groundwaterandglacialwateretc,andhumanactivitiesonthewaterresourcesthedamageandwiththedevelopmentofscienceandtechnologyandmoresevere,andwiththedevelopmentofeconomyandtheimprovementofpeople'slivingstandard,therequirementsfordrinkingwatermoreandmoreisalsohigh.Allthistothedevelopmentofpurificationprocessputsforwardnewrequirements.Conventionalwatertreatmenttechnologyofsuchsourcewatertreatmentisverypoor,itisdifficulttoachievenationalstandardsfordrinkingwater,throughtothevarietyofwatertreatmenttechnologiesincludingstrengtheningroutinetreatmenttechnology,chemical,andbiologicalpretreatment,advancedoxidation,adsorptionandmembraneprocessingtechnologyintheslightlypollutedwatertreatmentprinciple,functionandadvantagesanddisadvantagesarediscussed