UniFed　SBR　process　has　the　unique　feature　which　is　the　introduction　of　the　influent　into　the　settled　sludge　blanket　during　the　settling　and　decant　periods　of　the　operation.　It　achieved　suitable　conditions　for　denitrification　and　anaerobic　phosphorus　release　and　also　had　high　rate　of　nitrogen　and　phosphorus　removal.　In　our　experiment,　this　type　of　UniFed　SBR　process　for　treatment　of　domestic　wastewater　was　used　to　study　the　effect　of　ρ(C)/ρ(P)　ratio,　decant　ratio,　maximal　removal　of　phosphorus　loading　and　aeration　intensity　on　removal　of　phosphorus.　Results　show　that　when　ρ(C)/ρ(P)　ratio　is　23,　the　removal　efficiency　of　TP　is　94.67%.　When　the　ratio　of　ρ(C)/ρ(P)　is　higher　than　23,　the　concentration　of　phosphorus　in　the　effluent　is　0　kg/m3.　when　the　carbon　source　become　the　limiting　factor　to　phosphorus　release,　the　higher　decant　ratio　is,　the　lower　phosphorus　concentration　in　the　effluent　is.　When　the　carbon　source　is　adequate,　the　system　is　proved　to　have　a　reliable　performance　in　phosphorus　removal.　This　system　has　great　effect　on　phosphorus　removal　in　domestic　wastewater,　which　provides　a　new　method　to　enhance　biological　phosphorus　removal.