High strength industrial polyester yarn also is named as high strength industrial polyester silk. This material utilizes high tenacity fiber, with characteristics of high temperature resistance, low shrink and high tensile strength. Its color is basically the same as aramid yarn, so it can replace aramid yarn and be applied to soft optical fiber cable, indoor optical cable, tight buffered optical fiber cable, fiber optical patch cord and mining optical fiber cable, etc., plays a certain role of tensile resistance and padding that can lower production cost for customers.