In　order　to　explore　the　influence　of　organic　load　fluctuation　frequency　on　aerobic　granular　sludge　(AGS)　under　low-intensity　influent　conditions,　three　parallel　cylindrical　sequencing　batch　reactors(SBR),　R1,　R2　and　R3,　were　operated　by　constant　organic　loading　rate　(OLR)　and　two　alternating　OLR　modes　respectively,　fed　with　synthetic　water.　Their　high　and　low　OLR　were　0.67gCOD/(L∙d)/0.67gCOD/(L∙d),　0.74gCOD/(L∙d)/　0.56gCOD/(L∙d)　and　0.74gCOD/(L∙d)/0.56gCOD/(L∙d)　respectively.　The　fluctuation　frequency　of　organic　load　was　defined　as　the　number　of　OLR　high-low　fluctuation　every　12　days,　R1’s　OLR　did　not　fluctuate,　R2　and　R3　completed　OLR　high-low　fluctuation　every　12　days　and　4　days　respectively,　and　their　fluctuation　frequencies　were　0,　1　and　3　respectively.　The　results　showed　that　the　average　particle　sizes　of　R1,　R2　and　R3　were　318.86μm,　426.71μm　and　593.06μm,　respectively.　The　extracellular　polymeric　substance　(EPS)　content　(VSS)　were　71.97mg/g,　75.88mg/g　and　80.35mg/g,　PN/PS　were　4.24,　5.14　and　5.72,　respectively,　indicating　that　the　granules　had　higher　hydrophobicity　and　stability　when　the　fluctuation　frequency　was　3.　In　addition,　the　internal　carbon　storage　rates　(CODin)　of　R1,　R2　and　R3　were　97.06%,　98.37%,　98.91%,　respectively,　and　the　internal　carbon　storage　rate　(SND)　efficiencies　were　44.74%,　58.20%,　64.42%,　respectively.　The　average　total　phosphorus　(TP)　removal　efficiencies　were　86.82%,　89.36%　and　92.65%,　respectively,　the　average　total　nitrogen　(TN)　removal　efficiency　were　71.69%,　74.31%　and　78.55%,　respectively,　indicating　that　the　granules　had　higher　carbon　source　utilization　efficiency　and　pollutant　removal　ability　when　the　fluctuation　frequency　was　3.　©　2022　Chemical　Industry　Press.　All　rights　reserved.