The light resistance of high-strength polypropylene yarn itself is not good , the current problem by adding light stabilizer has been resolved. Polypropylene high-strength yarn is mainly used as industrial textiles. It requires that the final product must be resistant to ultraviolet light. In the future, it must be strictly controlled when producing polypropylene high-strength yarn. Polypropylene chips with light stabilizers must be added to prevent adverse effects caused by photo-aging.