Polypropylene short fiber is a kind of fiber. Polypropylene short fiber can improve the crack resistance, impermeability, impact abrasion resistance, frost resistance, explosion resistance of mortar/concrete and improve the workability of concrete. Tens of millions of fibers are evenly distributed in the mortar/concrete, which plays a good role in micro-reinforcing, which well maintains the integrity of the structure and avoids the structure from being scattered into many fragments when it is damaged by impact. The corrosion of steel bars in the structure can greatly extend the service life of the project and reduce the maintenance cost of the project.