The application of antioxidant termination agents in PVC production and their effects on the thermal stability of PVC were introduced,and was compared with water-soluble termination agents(ATSC type)by experiment.The results showed that:① Both antioxidant type terminators and water-soluble terminators exhibited good termination effects,with antioxidant type terminators having weaker termination effects than water-soluble terminators;② The static and dynamic thermal stability of PVC resin filled with antioxidant termination agent were significantly improved.