Abstract: Techniques utilized for poly (ethylene terephthalate)（PET）recycling and their recent developments are summarized，including melt recovery（direct reuse），incineration（energy reuse），and chemical degradation. Discussions are focused on chemical degradation，such as glycolysis，methanolysis，ammonolysis and hydrolysis. Appropriate technique for recycling PET should come from comprehensive understanding of purity and properties of PET as well the maturation and economic feasibility of recycling technique. Enzymatic depolymerization and depolymerization in supercritical fluids are two methods recently developed for PET recycling，the former is helpful to realize ecological reuse of PET wastes.