Airfloat sewage treatment device

The utility model relates to an air-flotation sewage treatment equipment, consisting of a tank drum 1, an air dissolving grooved drum 2 arranged in the tank drum, an air dissolving water nozzle 3, a reaction chamber 7, an upper annular water channel 4 and a lower annular water channel 5, a flow rising channel 6, a flow dropping groove 9 and a clean water groove 8 which are provided outside the tank drum, a water level controlling groove 84, the clean water groove 8 is provided with an overflow water outlet pipe 86 and a port of the water outlet pipe 87, the center of the upper end of the tank drum 1 is provided with a sewage discharging bucket 15, and a sewage discharging pipe 16 which is connected with the lower end of the sewage discharging bucket 15 and is leaded to the outside of the tank drum 1. The utility model has advantages of reasonable construction, compact structure, good using effects, convenient operation and management.