The　effluent　from　granular　sludge　Anammox　process　was　used　as　a　biocatalyst　to　improve　the　culture　rate　of　aerobic　granular　sludge,　and　the　internal　causes　of　this　effect　were　studied.　In　this　study,　in　sequencing　batch　reactor,　the　formation　and　changes　of　AGS　was　monitored　with　granular　sludge　Anammox　process　effluent　added　before　and　after.　The　community　structure　of　AGS　was　analyzed　by　molecular　biology　methods.　The　results　showed　ammonia　utilizing　rate　increased　from　3.41　to　5.96　mgNH(4)(+)-N/(g　VSS.h),　NO2--N　maintained　a　high　accumulation　rate,　and　the　denitrification　performance　remained　stable.　On　40th　day,　the　diameter　of　the　AGS　reached　3.5　mm,　and　the　concentrations　of　PN　and　PS　reached　330.5　and　62.9　mg/gVSS,　respectively.　The　community　structure　has　changed.　Nitrosomonas　(31.7%)　became　the　new　dominant　bacteria.　Signal　molecules　contained　in　the　effluent　as　inter-species　signal　molecules　could　enhance　the　formation　of　AGS.