The hitchpin type aluminum foil sleeve is made of new composite aluminum foil glass fiber cloth and flame retardant buckle, which can resist the heat radiation well, and provide reliable protection at 500 ℃ and withstand the high temperature physical impact below 1300 ℃ in a short time. Open (also known as buckle) design makes it easier to wrap the material to be protected. It is a kind of protective product specially used for short-time field cable maintenance and production, which is easy to install and can be disassembled and reused.