Abstract: In order to make an in-depth study on using recycled PET to produce textile fiber with high quality,thus reducing environmental pollution and promoting sustainable development,made a review of its processing technology,research and development in recent years both at home and abroad,and analyzed the problems in existence.Analysis showed that high quality textile fiber can be produced with recycled PET by chemical regeneration.The paper suggested that future research should focus on the de-polymerization,separation,purification,polymerization and spinning of PET for improving the quality of regenerated fibers.And some advanced separation methods such as alcoholysis and supercritical fluid have bright future.