The　feasibility　and　controlling　condition　of　partial　nitrification　induced　by　low　dissolved　oxygen　(DO)　was　investigated　under　room　temperature.　A　14L　sequencing　batch　reactor　(SBR)　fed　with　real　domestic　wastewater　was　proposed.　During　the　process　of　the　programmed　air　supply　decreasing　from　60　to　28　L　·　h-1,　the　change　from　complete　nitrification　to　partial　nitrification　occurred,　and　the　nitrite　accumulating　rate　exceeded　95　%,　with　the　effluent　nitrate　concentration　of　less　than　2.0　mg·L-1.　Coupled　with　nitrite　accumulation,　significant　nitrogen　removal　was　observed　and　the　maximum　average　nitrogen　removal　efficiency　reached　up　to　54.6　%　at　the　air　flow　of　32　L　·　h-1.　After　that,　the　air　supply　was　elevated　to　40　L·h-1　once　again,　and　the　partial　nitrification　still　kept　stable.　The　data　indicated　that　by　controlling　low　DO　concentration,　partial　nitrification　could　be　got　from　domestic　wastewater　under　room　temperature.　During　the　long-term　operation,　the　partial　nitrification　induced　by　low　DO　showed　the　perfect　stability　coupled　with　the　significant　nitrogen　removal　and　could　be　operated　under　relative　high　DO　condition.