Polyvinyl　chloride　(PVC)　is　the　common　microplastics　(MPs)　detected　in　wastewater　treatment　plants　causing　harmful　effects　on　organisms.　However,　the　effects　of　PVC　MPs　on　an　aerobic　granular　sludge　(AGS)　system　is　not　clear.　In　present　study,　the　behavior　of　nitrogen,　phosphorus　and　antibiotic　resistance　genes　(ARGs)　under　PVC　MPs　pressure　in　an　AGS　system　was　investigated.　Results　showed　PVC　MPs　promoted　the　phosphorus　release　and　uptake　of　polyphosphate　accumulating　organisms　(PAOs)　and　reduced　total　inorganic　nitrogen　removal　efficiency.　Extracellular　polymeric　substances　were　positively　linked　to　PVC　MPs.　Moreover,　PVC　MPs　increased　the　abundance　of　PAOs　and　Nitrospira,　but　decreased　the　abundance　of　denitrifying　bacteria.　The　propagation　of　intI1　and　tetE　could　be　facilitated　by　PVC　MPs,　and　the　main　antibiotic　resistance　mechanism　of　AGS　system　was　the　efflux　pump.　Chloroffexi,　Actinobacteria,　Bacteroidetes　and　Nitrospirae　hold　higher　tolerance　to　PVC　MPs　than　Proteobacteria.　Network　analysis　showed　PVC　MPs　positively　correlated　with　some　Accumulibacter　clades　and　ARGs.　This　study　indicated　PVC　MPs　inhibited　nitrogen　removal　and　benefited　ARGs　propagation,　which　need　to　cause　great　concern.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.