The password security door is safer and more convenient than the ordinary security door. There is a numeric keypad on the door lock of the password security door, which is electronically controlled. When starting, type a digital series in sequence. The advantage is that you only need to tell the unlocker password, no need to copy the key. However, if someone tells the password to an outsider, the lock will be ineffective. Therefore, the password of such a password lock needs to be replaced frequently.