Many　organic　nitrogen　compounds　are　contained　in　polluted　resource　of　drinking　water,　which　seriously　influence　on　chlorine　disinfection.　Typical　organic　nitrogen　compounds　including　glycine,　leucine,　lysine,　aspartic　acid,　cysteine,　and　methylamine　were　applied.　Influences　of　organic　nitrogen　compound　dosage　and　pH　on　disinfection　effects　are　investigated.　Results　show　that　many　organic　chloramines　are　produced　by　prompt　action　of　organic　nitrogen　compounds　and　free　chlorine　to　decrease　disinfection　effects　pronounced.　Influences　on　chlorine　disinfection　effects　are　different　through　different　organic　nitrogen　compounds.　Influence　of　cysteine　is　most　obvious　to　cause　chlorine　losing　disinfection　capacity.　Therefore,　contents　and　removal　of　organic　nitrogen　compounds　must　be　attached.　The　chlorine　dosing　mode　and　chlorine　disinfection　process　can　be　improved　and　the　effective　safe　disinfection　method　must　be　established.