Three-point adjustable rectangular plate bag lifting appliance

The invention discloses a three-point adjustable rectangular plate package lifting appliance which comprises a left lifting beam, a middle lifting beam, a right lifting beam and a lifting arm, a fixing part is fixed to the top of the lifting arm, a plurality of U-shaped grooves are formed in the upper side and the lower side of the lifting arm, the U-shaped grooves are formed in the lifting arm and evenly distributed in the lifting arm according to a certain distance, and positioning pins are inserted into the left lifting beam, the middle lifting beam and the right lifting beam. The left hanging beam is arranged on the U-shaped groove through the left hanging beam, the middle hanging beam is fixed to the center of the hanging arm through the positioning pin, the right hanging beam is arranged on the U-shaped groove through the positioning pin, and the left hanging beam and the right hanging beam move left and right on the hanging arm. The positioning pins are pulled out, so that the left hanging beam and the