Abstract: The primary object of the present invention is related to a cylinder lockset with a focusing apparatus which is comprised of a rotary disc, an upper pins seat, a bottom pins seat and a lock pad. The rotary disc of the invention is transfixed with a certain number focusing holes. The upper pins seat is transfixed with a certain number real and dummy corresponding holes & pins. The real corresponding holes of the upper pins seat are corresponded to the focusing holes of rotary disc and be provided with the corresponding pins. The dummy corresponding holes of the upper pins seat have dummy pins, springs and spring pads, which can be or can not be corresponded to the focusing holes of rotary disc. The bottom pins seat is transfixed with a certain number corresponding holes which be provided with corresponding pins, springs that can be corresponded to the real corresponding holes of the upper pins seat and the focusing holes of rotary disc.