PVA fiber for concrete (or mortar) is an ideal environment-friendly cement reinforcement material, because of its unique molecular structure, it has good affinity with cement, and has good alkali resistance and weather resistance. Adding PVA fibers to cement concrete (or mortar) can effectively control the cracks caused by plastic shrinkage and temperature changes in concrete (or mortar), prevent and inhibit the formation and development of cracks, and improve the flexural strength and impact resistance of concrete. It can effectively improve the impermeability, impact resistance and earthquake resistance of concrete.