The　anoxic/oxic　(A/O)　step　feed　process　unit　and　operation　parameters　were　adjusted　to　increase　organics　and　nutrient　removal　by　reconfiguring　the　process　into　a　modified　University　of　Cape　town　(UCT)　step　feed　process　treating　municipal　wastewater.　The　nutrients　removal　mechanisms　in　the　modified　UCT　step　feed　process　were　discussed　in　detail.　Results　showed　that　the　simultaneously　highest　removal　efficiencies　of　chemical　oxygen　demanding　(COD)　of　(83.9±3.3)%,　total　nitrogen　(TN)　of　(83.5±1.4)%　and　phosphorus　of　(86.6±2.4)%　were　obtained　in　the　modified　UCT　step　feed　process　with　the　optimum　operation　parameters,　which　were　the　influent　distribution　ratio　of　40%:30%:30%,　the　sludge　retention　time　of　8~9　d,　both　the　internal　recycle　ratio　and　the　sludge　recycle　ratio　of　75%,　and　the　ratio　of　anaerobic/anoxic/oxic　volumes　of　1:3:6.　In　comparison　with　A/O　step　feed　process,　nitrogen　and　phosphorus　removal　performance　was　remarkablely　improved.