In　traditional　biological　nitrogen　removal　process,　nitrification　can　be　divided　into　two　steps,　which　are　performed　by　two　separated　bacteria.　The　sensibilities　of　the　two　bacteria　to　the　environment　are　different.　The　second　step　of　nitrification　is　easy　to　be　inhibited,　which　result　in　accumulation　of　nitrite　defined　as　shortcut　nitrification.　In　this　paper,　two　reasons　of　the　nitrite　accumulation　was　classified,　correspondingly　the　chemicals　to　inhibit　the　nitrification　process　can　be　defined　as　two　kinds.　The　chemicals　which　can　lead　to　the　inhibitions　were　sorted　in　three　categories:　inorganic　nitrogen　compounds,　toxic　materials　and　disinfectants.　After　analyzing　the　current　research　results,　the　feasibility　of　the　disinfectants　application　was　focused　on.　Conclusion　was　made　based　on　the　analysis　of　safety,　dose　and　dose　frequency　that　is　feasible　to　use　disinfectants　as　selective　inhibitors　for　the　shortcut　nitrification.