This document specifies the terms and definitions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality commitment, etc. of cotton-type recycled colored polyester staple fiber. This document is applicable to cotton-type recycled colored polyester short fibers with a linear density of 0.90 dtex to 1.67 dtex. Other types of recycled colored polyester short fibers can be used as a reference. This document does not include recycled colored polyester staple fibers for nonwoven and filling applications.