Polypropylene staple fiber can well improve mortar / concrete crack resistance, impermeability, abrasion resistance, antifreeze ability, antiknock ability and improve the workability of concrete. Tens of thousands of polypropylene staple fiber are evenly distributed in the mortar / concrete, and play a very good role of micro-reinforcement, polypropylene staple fiber well to maintain the integrity of the structure, to avoid the impact of structural damage dispersed into many Debris, to prevent the corrosion of the structure of steel, polypropylene staple fiber can greatly extend the service life of the project, reduce the maintenance costs of the project.