Sewage treatment tank in corn deep processing

The utility model discloses a sewage treatment tank in corn deep processing, which comprises a working box, the inner wall of the working box is fixedly connected with a support plate, a rotating rod is vertically and rotatably inserted in the center of the support plate, the rotating rod is fixedly sleeved with an impeller, the lower end of the rotating rod is fixedly connected with a reciprocating lever, and the reciprocating lever is fixedly connected with a water pump. A reciprocating type bar sleeve is connected to the reciprocating type bar in a meshed mode, two transverse rods are symmetrically and fixedly connected to the left side and the right side of the reciprocating type bar sleeve, and a pull rope is fixedly connected to the side wall of each transverse rod. According to the chemical reagent adding device disclosed by the utility model, the cross rod can be driven to move up and down through the matched arrangement of the impeller, the rotating rod and the reciprocating lever, and the cross rod