Optical cable fiber yarn is a kind of inorganic non-metallic material with excellent performance, which has a wide variety of advantages, such as good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittle and poor wear resistance. Each bundle of fiber precursor consists of hundreds or even thousands of monofilaments. Optical cable fiber yarn is usually used as reinforcement material, electrical insulation material, thermal insulation material, circuit substrate and other fields of national economy in composite materials.