The utility model relates to a connector for a cartridge magazine of an automatic rifle. Because the utility model can shorten the changing time of the cartridge magazine of the automatic rifle, the service efficiency of the automatic rifle is improved, and the fighting strength of armies is reinforced. The connector is composed of a connecting frame, two pairs of elastic clamping claws and push plates. When the utility model is used, two cartridge magazines which are filled with bullets are connected in different directions (the directions of bullet outlets are oppositely) into an integral body. After the bullets in one of cartridge magazines are run out, the cartridge magazine which is connected in a whole immediately reverses end for end, and the cartridge magazine which is filled with the bullets on the other end is arranged on the gun to continuously use. Then, the elastic clamping claws are opened at an interval in the battle, the empty cartridge magazine is taken off, and the new cartridge magazine which is filled full with the bullets is arranged to continuously use.