Polypropylene fiber, also called concrete fiber, is a high-performance fiber specially used for concrete/mortar. It can effectively control micro-cracks caused by concrete/mortar shrinkage, dry shrinkage, temperature changes and other factors, and prevent and inhibit the formation and formation of primary cracks in concrete. Development, greatly improves the anti-cracking, anti-permeability and anti-abrasion properties of concrete/mortar, enhances the toughness of concrete, thereby extending the service life of concrete.