Water distribution device of biological aerated filter

The utility model discloses a water distribution device of a biological aerated filter in the technical field of biological aerated filters, which comprises a filter, a sludge dewatering device and an intercepting device, the filter comprises a biological filler layer, an aeration device and a backwashing water inlet pipe, the intercepting device is positioned in an upper cavity of the filter, and the biological filler layer is positioned at the lower end of the intercepting device. A baffle is arranged between the intercepting device and the biological filler layer, a round hole is formed in the middle of the baffle, an aeration device is arranged at the lower end of the biological filler layer, a backwashing water inlet pipe is located at the lower end of the biological filler layer, and a first water suction pump is arranged at the lower end of the filter tank and connected with a silt dewatering device through a sludge pipe; according to the sewage treatment device, solid garbage in sewage is effectively