Abstract: Effects of six different plasticizers on the mechanical property,thermal stability of poly(vinyl chloride) (PVC) compound were studied.The changes of Tg were studied by DSC,also shows the effectiveness of different plasticizers.The results showed that PVC plasticized by DOTP and TOTM have better static thermal stability at 180℃.The effect of plasticizers on the mechanical properties of PVC have no evident difference,while DOTP and TOTM plasticized PVC has higher hardness than others.The Tg of TOTM and ATBC plasticized PVC were about -22℃,other four plasticizer plasticized PVC has almost the same Tg of about -25℃.