Specifies the terms and definitions, product classification, labeling, requirements, test methods, inspection rules and signs, and packaging of antibacterial micro-nano inlay-spun regenerated cellulose fiber natural yarn. The requirements for antibacterial micro-nano inlaid spinning regenerated cellulose fiber natural yarn include linear density deviation rate, linear density variation coefficient, single yarn breaking strength, single yarn breaking strength variation coefficient, evenness unevenness variation coefficient, kilometer neps (+200 %), yarn defects per 100,000 meters, hairiness number, and antibacterial rate.