USB port security protection device for power information network security terminal

The invention provides a USB port security protection device for a power information network security terminal. The USB port security protection device comprises a protection head movably inserted in a USB port and an attraction handle for extracting the protection head, wherein the protection head comprises a protection box, a movable buckle is arranged on the protection box, springs and an iron core are arranged in the protection box, one end of each spring is connected with the movable buckle, the other end of each spring is connected with the iron core, the protection head seals the USB port through the movable buckle, the attraction handle is operated to make the iron core move, the movable buckle is driven to move through the springs, and therefore the protection head breaks away from the USB port. The security protection device is simple in structure and easy to realize, insertion and extraction are convenient, meanwhile, the USB port can be well sealed, secure operation of the power information networ