Abstract: A plurality of polypropylene wickers are made of a polypropylene film. The polypropylene film passes through a chill roller to decrease a temperature of the polypropylene film, and a cutting roller having a plurality of cutting blades to cut the polypropylene film into a plurality of polypropylene bands. Each of the polypropylene bands passes through a U-shaped mold roller set and a folding mold, the folding mold folding the corresponding polypropylene band into three layers, a folding roller folding the corresponding polypropylene band completely to form a polypropylene woven yarn, and the polypropylene woven yarn passing through an extension molding roller set and a setting roller set.