The　initiating　and　stable　preservation　of　partial　nitrification　(PN)　and　achievement　of　anammox　bacteria　selfenrichment　in　domestic　sewage　is　a　purposeful　subject.　In　this　article,　an　originality　tactics　of　anaerobic　starvation　for　100　days　was　adopted　for　rapidly　achieving　PN　in　actual　wastewater,　the　nitrite　accumulation　rate　(NAR)　improved　from　4.95%　to　81.73%　in　18　days.　After　anaerobic　starvation　was　stopped,　the　stable　PN　effect　furnished　enough　stroma　for　the　growth　of　anammox　bacteria.　The　abundance　of　Candidatus　Brocadia　grew　from　0%　to　0.42%　in　floc　sludge　and　0.43%　in　blank　biofilm,　which　promoted　nitrogen　removal　effect.　Anaerobic　starvation　continuing　74　days　generated　further　decrease　in　the　abundance　of　Nitrobacter　and　Nitrospira　of　nitriteoxidizing　bacteria　(NOB),　indicating　that　anaerobic　starvation　can　restore　the　destroyed　partial　nitrification.　In　conclusion,　this　article　furnished　a　low-cost　method　for　achieving　anammox　bacteria　self-enrichment　in　mainstream　municipal　wastewater　in　10%　filling　ratio　without　chemicals　addition.