AAO type fluidized bed integration sewage treatment device

The utility model provides a AAO type fluidized bed integration sewage treatment device, include: the sewage input system to input pending sewage, anaerobic chamber with sewage input system intercommunication to turn into the micro molecule organic matter with the macromolecule organic matter in the pending sewage, scarce oxygen chamber with the anaerobic chamber intercommunication to make pending sewage take place denitrification, be nitrogen gas to the nitrate -nitrogen reduction, good oxygen chamber with scarce oxygen chamber intercommunication to explain the micro molecule organic matter in the pending sewage, will good oxygen chamber top with the return -flow system of scarce oxygen chamber intercommunication to made in the oxygen chamber in the pending sewage backward flow of unreduced nitrate nitrogen go into to detest among the oxygen chamber, reacting chamber with good oxygen chamber intercommunication to water and mud behind the separation processing in the sewage, and confession dephosphorization m