As a security product, door locks must be safe and stable. Security can be measured from two aspects: first, resistance to intentional sabotage, mischief and deliberate violence such as prying and drilling. In this regard, the mechanical strength of mechanical locks and electronic door locks can generally meet the requirements. Among all kinds of door locks, only the RF card electronic door lock is a fully closed structure, and its security is the best. Second, the ability to prevent technical opening of mechanical locks is poor. The mechanical lock of any structure can be opened by other means. The key can be copied, which is a great security risk. In the electronic door lock, the key card of the magnetic card is easy to be copied because there is no password restriction. IC card and RF card completely solve the problem of opening the prevention technology.