In this study,the hydroxyl terminated liquid fl uororubber 26 was prepared and its application was investigated. The hydroxyl terminated rubber was prepared by reduction reaction of carboxyl terminated precedent investigated. The hydroxyl terminated rubber was prepared by reduction reaction of carboxyl terminated precedent using potassium borohydride/sulfuric acid as catalyst system. The hydroxyl terminated fl uororubber 26 and carboxyl terminated fluororubber 26 were then applied in HNBR as plasticizers,re...