Self-locking hinge

The utility model relates to the technical field of hinge equipment, and provides a self-locking hinge which comprises a fixed part and a movable part which are hinged, one end of the movable part is connected with a movable rod, the fixed part is connected with a locking device, the locking device comprises a base and a locking rod, one end of the base is hinged with one end of the locking rod, the base is provided with a locking groove and a fixed groove, and the fixed groove is connected with the locking rod. The side, close to the base, of the locking rod is connected with an arc-shaped carrying table, the carrying table is provided with an arc-shaped concave face capable of being matched with the movable rod, and the locking rod is further provided with a locking piece capable of being matched with the fixing groove. Through the arranged locking rod, the arc-shaped concave surface on the locking rod can buffer the movable rod for the first time, when the movable piece continues to be pushed, the locking