Nitrite　acting　as　electron　acceptor　for　achieving　shortcut　denitrifying　phosphorus　removal　(DPR)　was　studied　considering　nitrite　and　pH　inhibition.　Anaerobic-anoxic-aerobic　(A2/0)　oxidation　ditch　(OD)　process　treating　the　municipal　wastewater,　combined　with　batch　tests,　was　used　to　evaluate　DPR.　With　the　stabilized　DPR　of　the　OD　system,　the　activated　sludge　of　batch　tests　was　taken　from　the　aerobic　zone　of　the　OD.　Phosphorus　releasing　after　acetate　added,　anoxic　phosphorus　uptake　and　denitrification　at　different　level　of　nitrite　and　pH　was　studied.　Results　indicated　that　the　specific　denitrification　rate　and　specific　phosphorus　uptake　rate　correlating　to　the　initial　nitrite　accorded　with　Andrews＇　inhibition　model　under　the　different　pH　levels.　When　pH　was　in　the　range　from　6.5　to　8.0,　nitrite　inhibits　DPR　much　stronger　than　lower　pH.　The　max　specific　denitrification　rate　was　estimated　to　be　4.55　mg/(g·h)　with　the　half　saturation　constant　for　the　denitrification　process　of　2.14　mg/L.　The　max　specific　phosphorus　uptake　rate　was　found　as　3.06　mg/(g·h)　with　the　half　saturation　constant　for　the　phosphorus　uptake　process　of　2.64　mg/L.　The　influence　of　nitrite　on　phosphorus　uptake　was　much　stronger　than　denitrification　with　the　raise　of　the　nitrite　concentration　when　pH　kept　in　low　level.