Dioctyl terephthalate (DOTP) is an excellent main plasticizer for polyvinyl chloride (PVC) plastics. Compared with the commonly used diisooctyl phthalate (DOP), it has the advantages of heat resistance, cold resistance, difficult volatilization, resistance to extraction, flexibility and good electrical insulation properties, and shows excellent durability in products. Soap water resistance and low temperature flexibility. Because of its low volatility, the use of DOTP can fully meet the requirements of wire and cable temperature resistance level, can be widely used in 70°C resistant cable material (International Electrotechnical Commission IEC standard) and other various PVC soft products. Can also be used in the production of artificial leather film. In addition, it has excellent compatibility and can also be used as a plasticizer for acrylonitrile derivatives, polyvinyl butyral, nitrile rubber, cellulose nitrate, etc. Can also be used for synthetic rubber plasticizer, paint additives, precision instrument lubricants, lubricant additives, can also be used as a paper softener.