Because PLA fiber has good heat resistance, it can be made into filaments, short filaments, monofilaments and nonwovens, just like ordinary PET fibers. The device can produce braids, tapes, non-woven fabrics, etc. without major modifications. In addition, although PLA fibers have poor water absorption, they have good water diffusibility, such as blending with cotton, and can be made into a sweat-absorbent and quick-drying composite. As a fiber material of a nonwoven fabric, it has a good hand feeling, drapability, and resilience, and has excellent curling property and curl stability, and can control shrinkage rate.