Biochemical treatment unit of buried sewage treatment equipment

The utility model discloses a biochemical treatment unit of buried sewage treatment equipment, which comprises an aeration device, a biological filler component and a surge device, the biological filler component is fixedly arranged above the aeration device, and the surge device is arranged above the aeration device. The inrush flow device comprises a driving transmission group, three driven transmission groups, a transmission chain and a plurality of inrush flow plates fixedly mounted at the transmission chain, the driving transmission group is fixedly arranged at one azimuth angle of the aerobic tank, and the three driven transmission groups are fixedly arranged at the other three azimuth angles of the aerobic tank respectively; the transmission chain is arranged around the driving transmission group and the three driven transmission groups, the transmission chain is arranged around the aerobic tank, and the plurality of inrush flow plates are arranged on the transmission chain at equal intervals. Accordin