Partial　nitritation　is　a　key　step　toward　cost-effective　shortcut　biological　nitrogen　removal　and　anammox　process.　The　current　study　presents　a　novel　method　for　achieving　partial　nitritation　at　influent　ammonium　nitrogen　concentration　of　100　mgNL(-1)　using　short-term　starvation　and　low　air　flow　rate.　Mixed　activated　sludge　was　introduced　into　sequencing　batch　reactor　(SBR)　under　aerobic/anaerobic　condition.　Variations　in　the　reactor　performance,　nitrifying　bacteria　activities,　and　bacterial　community　structures　were　investigated.　The　results　showed　that　partial　nitritation　was　rapidly　achieved,　and　an　average　nitrite　accumulation　rate　(NAR)　of　878　gNm(-3)d(-1)　was　observed.　The　short-term　starvation　stress　on　nitrite　oxidation　bacteria　(NOB)　activity　was　relatively　higher　than　that　on　aerobic　ammonium　oxidation　bacteria　(AerAOB)　activity.　The　dominant　species　of　general　AerAOB　were　Nitrosomonas　and　Nitrosomonadaceae_uncultured,　which　had　better　self-adaption　to　shortterm　starvation.　The　moderate　starvation　could　be　utilized　to　achieve　nitrite　accumulation　and　nitritation.