Refrigerator freezing air duct cover plate with locking structure

The utility model discloses a refrigerator freezing air duct cover plate with a locking structure, which comprises a cover plate and a connecting plate, the two sides of the connecting plate are fixedly connected with mounting blocks, the interiors of the mounting blocks are movably connected with screw rods, the exteriors of the screw rods are in threaded connection with nuts, the exteriors of the screw rods are in threaded connection with positioning rods, and the screw rods are in threaded connection with the locking structure. A positioning groove is formed in the positioning rod, the nut is located at the top of the mounting block, and the positioning groove is an arc-shaped groove. The push rod is pushed to move, so that the connecting frame is driven to move, the connected push plate is pushed to rotate, the push plate drives the rotating shaft to rotate, the other push plate is driven to rotate, the fixing strip retreats from the interior of the positioning groove in the positioning rod, and the conne