Biological efficient aeration tank

The utility model discloses a biological high-efficiency aeration tank which comprises a tank body, clamping frames are clamped on two sides of the tank body, connecting plates are fixed on opposite sides outside the two clamping frames, a lifting mechanism used for lifting the connecting plates is arranged outside the tank body, and the lifting mechanism is used for lifting the connecting plates.A connecting block and a guide pipe are fixed to the opposite sides of the interiors of the two clamping frames respectively, a connecting pipe is connected to the top of the guide pipe, a spraying pipe is arranged between the connecting block and the guide pipe, and a plurality of spraying holes are formed in the two sides of the outer portion of the spraying pipe in a rectangular array mode. The hydraulic rod enables the connecting plate to drive the clamping frame to move upwards or downwards along the outer wall of the tank body, the depth of the spray pipe in the tank body can be adjusted, sewage tanks with diff