Removal　of　denitrifying　phosphorus　was　verified　in　a　laboratory　anaerobic/anoxic　sequencing　batch　reactor　(A/A　SBR).　The　results　obtained　demonstrated　that　the　anaerobic/anoxic　strategy　can　enrich　the　growth　of　denitrifying　phosphorus　removing　bacteria　(DPB)　and　take　up　phosphate　under　anoxic　condition　by　using　nitrate　as　the　electron　acceptor.　The　phosphorus　removal　efficiency　was　higher　than　90　%　and　the　effluent　phosphate　concentration　was　lower　than　1　mg(.)L(-1)　after　the　A/A　SBR　was　operated　in　a　steady-state.　When　the　chemical　oxygen　demand(COD)　of　influent　was　lower　than　180　mg(.)L(-1),　the　more　GOD　in　the　influent,　was,　the　higher　efficiency　of　phosphorus　removal　could　be　attained　under　anoxic　condition.　However,　simultaneous　presence　of　carbon　and　nitrate　would　be　detrimental　to　denitrifying　phosphorus　removal.　Result　of　influence　of　sludge　retention　time　(SRT)　on　denitrifying　phosphorus　removal　suggested　that　the　decrease　of　SRT　caused　a　washout　of　DPB　and　consequently　the　enhanced　biological　phosphorus　removal　decreased　with　8　days　SRT.　When　the　SRT　was　restored　to　16　days,　however,　the　efficiency　of　phosphorus　removal　was　higher　than　90　%.