Odor purification fan for processing and packaging pig feed

The utility model discloses an odor removal fan for pig feed processing and packaging, and relates to the technical field of pig feed auxiliary packaging, the odor removal fan comprises an air blower, the air outlet end of the air blower is fixedly connected to the center position of the side face of a distribution box, and a sterilization plate is movably inserted in the center position of the upper surface of the distribution box in the vertical direction; butt-joint pipes are symmetrically and rotationally connected to the side faces of the distribution box and rotationally connected to the side faces of the vertical plates through bearings, shifting wheels are welded to the positions, close to the outer wall of the distribution box, of the butt-joint pipes, and expanding and supporting mechanisms for rapidly fixing packaging bags are arranged on the outer walls of the butt-joint pipes. According to the utility model, the plurality of groups of butt-joint pipes are fixedly communicated with the side surfac