Tri(2-propyl heptanol)citrate(TPHC) was prepared from Citric acid and 2-propyl heptanol,choosed activated carbon supported para toluenesulfonic acid as catalys.The results of experiments showed the best reaction conditions of esterification were described as follows: reaction time 4h,amount of catalyst 1.5%(based on the mass of acid),molar ratio of 2-propyl heptanol to Citric acid 3.7:1,reaction temperature less than 140℃.Esterification yield is greater than 99.5%.The product was confirmed by IR and MS.The TPHC was used as plasticizers in polyvinylchloride (PVC),analysised by Tensile properties,weight loss on heating and TG.The results showed that TPHC can excellent plasticized, with the performance of the high temperature and evaporate resistance and had great value of industrial development.