Aerobic　granular　sludge　(AGS)　and　anaerobic　ammonium　oxidation　(Anammox)　technologies　are　currently　very　economical,　efficient　and　promising　technologies.　This　study　is　based　on　a　new　continuous　flow　aeration　self-circulation　process　inoculated　with　AGS　and　Anammox　to　treat　actual　low　C/N　urban　sewage.　The　water　quality　control　strategy　of　the　reactor　and　the　stabilization　strategy　of　the　granular　sludge　system　were　studied　in　detail.　The　results　show　that　when　the　oxygen　supply-demand　ratio　is　close　to　1,　the　total　nitrogen　(TN)　removal　efficiency　reaches　80.6　%,　and　the　maximum　can　reach　94.7　%.　The　total　nitrogen　removal　mainly　depends　on　denitrification,　and　the　contribution　of　simultaneous　nitrification　and　denitrification　(SND)　to　nitrogen　removal　exceeds　10　%.　Whether　the　oxygen　supply　is　sufficient　also　affects　the　proportion　of　extracellular　proteins　and　polysaccharides　in　the　sludge　and　the　distribution　of　microbial　communities,　thereby　affecting　the　stability　of　the　granular　sludge　system.