Abstract: The study of this paper is about the dissolving and recycling of cotton component from waste cotton-polyester blended fabric via NMMO solvent. To study the affecting effects of polyester when dissolved in NMMO solvent, compared with some factors, including dissolving temperature, dissolving time and antioxidants supplements, there is no effect on the weight and molecule structure of polyester. The dissolving properties of cotton component in the waste polyester/cotton blended fabric which were dissolved 1.5h under 85℃ via NMMO solvent were investigated later, after the polyester filtrated, the property of the cellulose solution was characterized by the image of polarizing microscope, refractive index, rheological behavior to study the spinnability. The study found the solution of high degree of polymerization but low cellulose content also shows good spinnability.