USB interface protection device

The utility model provides a USB interface protection device, and belongs to the technical field of USB interfaces. The USB interface protection device comprises a computer host part, a USB interfaceand a blocking cover part. The computer host device comprises a shell, and a containing groove is formed in one side of the shell. The USB interface is connected into the shell, a jack corresponding to the USB interface is further formed in the containing groove, and a chamfer is formed in the end of the jack. The blocking cover piece comprises a blocking cover and a first sealing block, the blocking cover is matched with the containing groove, the bottom end of the blocking cover is rotatably connected into the containing groove, the first sealing block comprises a block body, and the block body is fixedly connected to the blocking cover. When the USB interface is not used, the blocking cover is closed in the accommodating groove, the block body blocks the jack, and the inclined surface is attached to the chamfer