It　is　a　challenging　subject　to　realize　nitrogen　and　phosphorus　elimination　synchronously　from　limited-carbon　sewage　through　conventional　biological　processes.　Herein,　a　novel　continuous　flow　anaerobic/oxic/anoxic/　oxic　(AOA-O)　process,　which　integrated　denitrifying　dephosphatation,　endogenous　denitrification　and　anammox　in　the　anoxic　zone,　was　developed　to　enhance　nutrient　elimination　from　low　carbon/nitrogen　sewage　(3.4　in　average).　After　the　long-term　operation　(280　days),　a　satisfactory　nutrient　removal　performance　(effluent　PO43--　P:　0.2　mg　P/L,　total　inorganic　nitrogen　(TIN):8.9　mg　N/L)　was　obtained.　Mass　balance　indicated　that　anammox　contributed　to　26.1%　TIN　removal　and　denitrifying　dephosphatation　contributed　to　25.6%　phosphorus　removal,　respectively.　The　cooperation　of　anammox　bacteria　retained　in　biofilms　and　endogenous　denitrifying　bacteria　in　flocculent　sludge　was　responsible　for　the　enhanced　nutrient　removal　in　the　anoxic　zone.　Dechloromonas　carried　out　phosphorus　uptake　both　under　oxic　conditions　and　anoxic　conditions.　This　study　can　broaden　the　application　prospect　of　mainstream　anammox.