To　shorten　the　start-up　time　of　the　CANON　granular　sludge　process　and　improve　the　total　nitrogen　removal　rate　in　the　engineering,　the　start-up　method　of　CANON　granular　sludge　process　and　the　strategy　for　enhancing　the　total　nitrogen　removal　rate　were　studied　in　an　SBR　reactor.　During　the　experiment,　the　temperature　was　controlled　at　30±1　and　the　pH　was　7-8,　the　aeration　rate　and　settling　time　were　operated　according　to　the　sludge　properties　and　effect　of　nitrogen　removal.　The　results　showed　that　the　transition　of　the　sludge　properties　from　combined　floc-granule　to　granule　was　realized　after　55　d.　The　total　nitrogen　removal　rate　reached　0.32　kg·(m3·d)-1　and　remained　stable　after　117　d,　thus　the　reactor　was　started　up　successfully.　With　constant　improvement　of　the　aeration　rate,　the　average　NRR　was　maintained　at　1.35　kg·(m3·d)-1　after　77　d　and　improvement　of　the　process　load　was　achieved.　The　results　showed　that　there　was　good　correlation　between　the　NRR　and　DO,　therefore,　the　NRR　can　be　determined　by　observing　the　DO　and　the　process　can　be　maintained　stably.　©　2017,　Science　Press.　All　right　reserved.