In　this　study,　the　effect　of　different　carbon　sources　on　realizing　shortcut　nitrification-denitrification　was　investigated.　Two　lab-scale　sequencing　batch　reactors　(SBRs)　were　operated　by　using　artificial　wastewater　under　alternating　oxic-anoxic　model.　SBR　A　used　starch　as　carbon　source　and　glucose　was　used　for　SBR　B.　The　results　showed　that　the　average　removal　rates　of　ammonia　nitrogen　and　COD　in　SBR　A　and　SBR　B　were　90.23%　and　92.85%,　76.22%　and　83.44%.　Both　reactors　realized　shortcut　nitrification-denitrification　in　the　end　of　test,　and　the　NAR　could　be　above　80%.　However,　the　NOB　elutriation　ratio　of　SBR　B　was　faster　than　SBR　A　even　though　that　the　nitrite　accumulation　produced　in　SBR　A　earlier.　SBR　A　got　sludge　bulking　with　the　increase　of　the　sludge　volume　index　(SVI),　and　the　systemic　removal　efficiency　of　total　nitrogen　and　organic　matter　reduced.　As　time　went　on,　the　microorganisms　in　the　sludge　adapted　to　the　carbon　source　and　the　SVI　was　approximate　300ml/g　steadily.