Three　SBR　reactors　R1,　R2　and　R3　with　the　same　specifications　were　set　up,　which　were　operated　in　A/O/A-A/O/A,　A/O/A-A/O,　and　A/(O/A)n-A/O　modes　respectively.　Using　synthetic　wastewater　as　the　influent　substrate,　the　inoculated　sludge,　consisting　of　70%　aerobic　granular　sludge　and　30%　flocculent　sludge,　were　obtained　from　the　laboratory　for　long-term　starvation　at　4　℃.　Under　the　same　initial　conditions,　the　activity　recovery　and　short-cut　nitrification　and　denitrification　phosphorus　removal　performance　of　granular　sludge　under　different　operation　modes　were　discussed.　The　results　showed　that　the　combined　anaerobic/micro-aerobic　A/(O/A)n　alternating　operation　mode　had　great　advantages　in　realizing　the　activity　recovery　of　granular　sludge　and　the　performance　of　pollutant　removal.　The　dense　granules　were　formed　with　an　average　particle　size　of　802.98µm　in　R3,　and　the　EPS　content　reached　94.52mg/gVSS,　indicating　that　the　alternating　operation　mode　of　combined　anaerobic/microaerobic　stimulated　microorganisms　to　secrete　more　EPS,　and　the　granule　structure　was　more　stable.　During　the　stable　operation　period,　the　removal　efficiency　of　COD,　TP　and　TN　of　R3　reached　92.45%,　93.72%　and　97.24%　respectively.　Meanwhile,　the　proportion　of　denitrifying　phosphorus　accumulating　organisms　with　nitrite　as　electron　acceptor　in　the　system　reached　51.46%,　which　could　realize　the　simultaneous　enrichment　of　AOB　and　DPAOs,　thereby　exhibiting　good　pollutant　removal　effect.　©　2022　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.