Although the production of recycled cotton yarn realizes the recycling and comprehensive utilization of textile waste, consumers are not yet aware of it. In foreign countries, the price of recycled textiles is often 10%~20% higher than that of ordinary textiles, but it is difficult to get rid of the low-end and cheap image in China. Incidents such as "Black Heart Cotton" have also made many people resistant to recycled textiles. In fact, the main raw material of recycled cotton yarn is the scraps produced during the production of clothing. These materials are all new and are not the same concept as second-hand clothing and old clothing that people usually understand.