X-ray protection device and security inspection machine

The utility model relates to an X-ray protection device which comprises a protection mechanism and an optical machine, the protection mechanism comprises a fixed cover and a movable cover, the fixed cover and the movable cover jointly wrap the optical machine, the distance between the fixed cover and the optical machine is fixed, the movable cover is located between the fixed cover and the optical machine, and the distance between the movable cover and the optical machine is adjustable. The movable cover is provided with a kidney-shaped hole, the X-ray protection device further comprises a fastener, and the fastener penetrates through the kidney-shaped hole and then extrudes the movable cover together with the fixed cover. According to the protection device, the X-rays leaked between the fixed cover and the light-emitting ends of the corresponding light machines can be completely wrapped by the movable cover while the light machines are conveniently mounted and dismounted, so that the protection performance o