Fingerprint authentication combined with a sound alarm, which offers a better usability on a journey, as well as preventing criminal behaviour against the belonging it is securing that the traditional padlocks are unable to achieve. Metal integrated packaging and anti-disassembly technology, high strength aviation environmental protection aluminum material quality, 20 processes, CNC diamond cutting careful grinding, 3D solid sandblasting, 3D ball processing. The shape is smooth and smooth, and the front is made of acrylic panel. The overall module structure of the fuselage is compact and strong. Most padlocks on the market take the form of combination code or physical key, the former option has the tendency of the user forgetting their private combination, the latter option causes inconvenience in currently convenient life. We explored the issues from another perspective and went a different direction to design a fingerprint padlock.