Computer USB interface information security prevention and control method and system

The invention discloses a computer USB interface information security prevention and control method, which comprises the steps that external USB equipment is connected into a security management and control module, and the security management and control module sends a connection instruction to a management machine; the management machine receives the access instruction, controls a computer camerashooting unit to be started and judges whether the user is an authorized person or not, and if so, detection is passed, and if not, permission detection is conducted again through a detection module;the detection information is sent to the management machine; and the management machine controls the on-off of a switch in the security management and control module according to the detection information. According to the computer USB interface information security prevention and control method, the computer host receives the on-off information and sends the on-off information to the managementmachine, and access permiss