The　series　combination　process　of　oxidation　pond　and　constructed　wetlands　was　studied　on　slightly　polluted　river　water　treatment　of　Xinkai　River　in　Changchun　city.　Based　on　the　study,　the　series　of　water　treatment　process　could　be　used　to　treat　slightly　polluted　river　water,　because　of　the　effluent　of　sewage　treatment　plant　and　channel　point-source　pollution.　The　main　indicators　of　treated　water　could　achieve　or　exceed　the　surface　water　class　IV　standard.　It　can　be　used　for　agricultural　irrigation,　fisheries　and　wetlands　complement;　Constructed　wetland　system　plays　a　main　role　in　the　series　process,　so　it　should　be　adopted　preferentially　in　practical　engineering　applications;　In　the　Spring,　the　quality　of　river　water　was　so　poor　that　treated　result　was　bad,　but　it　can　improve　operation　effect　by　strengthening　the　oxidation　pond　aeration.　©　2013　Taylor　&　Francis　Group.