The　effects　of　influent　COD　and　ammonia　nitrogen　mass　concentration　on　alternating　oxic-anoxic　shortcut　nitrification-denitrification　were　studied　specially　in　some　experiments　carried　on　a　sequencing　batch　reactor　(SBR).　The　following　results　are　shown:　Real-time　control　parameters　and　removal　efficiency　were　not　influenced　by　different　kinds　of　influent　COD　and　ammonia　nitrogen　mass　concentration　in　biological　nitrogen　removal　process　via　alternating　oxic-anoxic　shortcut　nitrification-denitrification,　and　the　operation　of　whole　system　was　stable.　However,　aeration　time　was　changeable　with　various　kinds　of　COD　and　ammonia　nitrogen　mass　concentration　in　influent.　More　time　duration　for　the　nitrification　was　needed,　if　ammonia　nitrogen　mass　concentration　in　influent　was　much　high.　Nitrification　and　denitrification　were　whole　finished　because　of　using　real-time　control　strategies,　and　ammonia　and　nitrite　were　not　detected　in　effluent　of　SBR.　Therefore,　it　is　shown　that　there　is　strong　ability　resisting　the　change　of　influent　COD　and　ammonia　in　alternating　oxic-anoxic　shortcut　nitrification-denitrification　process,　and　the　system　is　stable　when　the　real-time　control　strategy　is　used　to　control　the　process　for　nitrogen　removal.