Automatic screen changer of packing material production equipment

The utility model provides an automatic screen changer of packing material production equipment, which comprises a film blowing machine main body and a feed hopper, the feed hopper is arranged on the film blowing machine main body, a die head arranged on the film blowing machine main body is arranged at one end far away from the feed hopper, and a sealing cavity arranged in the film blowing machine main body is arranged at the bottom of the die head. A sealing plate used for sealing the sealing cavity is installed in the sealing cavity, a sealing gasket is fixed to the inner wall of the sealing cavity, the sealing plate is connected with the sealing gasket in a matched mode, a movable disassembling and assembling frame is fixed to the end, close to the die head, of the sealing plate, and an installation piece capable of moving along the sealing cavity is arranged in the sealing cavity. The end, away from the sealing plate, of the movable dismounting and mounting frame is connected with the mounting piece in a