N2O　production　and　emission　in　nitrogen　removal　process　treating　real　domestic　wastewater　was　studied　utilizing　oxic-anoxic　SBR　system.　The　influence　of　nitrification　type　on　N2O　production　in　nitrogen　removal　was　investigated　mainly.　N2O　was　mainly　produced　in　nitrification,　while　denitrification　potentially　lower　N2O　emission.　N2O　production　in　complete　and　short-cut　nitrification　was　1.87　mg/L　and　0.90　mg/L,　respectively.　Under　the　condition　of　the　short-cut　nitrification,　N2O　production　was　obviously　lower　than　that　in　the　complete　nitrification.　Not　control　of　DO　concentration,　applying　real-time　controlling　the　short-cut　nitrification　and　denitrification　could　lower　the　N2O　production　in　nitrogen　removal　from　domestic　wastewater.