Air floatation device with sewage precipitation function

The utility model relates to the technical field of sewage treatment, and particularly discloses an air floatation device with a sewage precipitation function, which comprises a separation barrel and a barrel cover detachably connected to the top end of the separation barrel, a sewage outlet is arranged at the bottom end of the separation barrel, a sewage inlet is arranged on one side of the separation barrel, and a vent hole is arranged on the other side of the separation barrel. A ventilation assembly communicating with the ventilation opening is arranged in the separation barrel and comprises an air guide pipe communicating with the ventilation opening, a first ventilation pipe communicating with the free end of the air guide pipe and a plurality of bubble generators communicating with the first ventilation pipe. A ventilation assembly is arranged in the separation barrel, a floating assembly used for cleaning floating impurities in sewage and a power assembly used for driving the floating assembly are fur