Polypropylene fibers are synthetic fibers spun from isotactic polypropylene, obtained by polymerizing propylene, commonly known as "polypropylene" or "PP" in China. They can be categorized into long fibers, short fibers, spunbonded nonwoven fabrics, meltblown nonwoven fabrics, and more. Polypropylene fibers boast high strength, excellent toughness, good chemical resistance, excellent antimicrobial properties, and low cost, making them widely used in industries such as ropes, fishing nets, safety belts, bag straps, safety nets, sewing threads, cable sheathings, geotextiles, filter fabrics, paper-making felts, and reinforcement materials for paper. Polypropylene woven geotextiles, manufactured with their high strength, acid and alkali resistance, antimicrobial properties, and equal strength in wet and dry conditions, can reinforce civil engineering projects built on soft soil foundations (like dams, reservoirs, highways, and railways) and ensure even load distribution across the geotextile, leading to uniform subgrade settlement and reduced ground cracking. When constructing slopes, woven polypropylene geotextiles can stabilize the slope, reduce slope failures, shorten construction time, and prolong the slope's lifespan. For heavier loads, composite geotextiles with woven and nonwoven bases can be used. Polypropylene fibers can also be used as filling materials for concrete and mortar, enhancing the impact resistance and waterproofing/insulating properties of concrete.