Based　on　the　characteristics　of　low　carbon　source　of　municipal　wastewater　in　the　southern　regions,　this　paper　studied　the　effects　of　different　concentration　and　addition　mode　of　nitrate　on　denitrifying　phosphorus　removal　with　nitrate　as　electron　acceptor,　and　it　was　specially　studied　that　the　control　strategy　with　on-line　monitoring　V　(ORP)　and　pH.　The　experiments　showed　that　the　higher　or　lower　concentration　of　nitrate　in　anoxic　phase　can　lower　simultaneous　phosphorus　and　nitrogen　removal.　In　order　to　achieve　good　and　stable　simultaneous　phosphorus　and　nitrogen　removal　over　time,　the　concentration　of　nitrate　should　be　in　a　proper　range.　With　on-line　monitoring　V　(ORP)　and　pH,　there　would　be　a　turning　point　in　pH　when　nitrate　was　used　up　and　phosphorus　uptake　ended,　if　nitrate　wasn＇t　enough.　When　phosphorus　uptake　ended　with　nitrate　enough,　there　was　a　plat　in　pH.　So　pH　can　reflect　the　condition　of　phosphorus　uptake　and　denitrifying　in　anoxic　phase　and　can　be　used　to　optimize　and　control　denitrifying　phosphorus　removal　processes.　While　there　wasn＇t　any　characteristic　point　in　V　(ORP)　to　infer　the　condition　of　phosphorus　uptake　and　denitrifying　in　anoxic　phase,　V　(ORP)　can＇t　be　the　controlling　parameter　in　denitrifying　phosphorus　removal　processes.　The　addition　mode　of　nitrate　couldn＇t　affect　the　efficiency　of　simultaneous　phosphorus　and　nitrogen　removal,　but　it　was　favorable　to　advance　denitrification　rate　and　decrease　accumulation　of　nitrite　along　with　addition　number　of　frequency　increasing　and　continuous　addition　with　low　concentration　nitrate　especially.