Abstract: A kind of liquid benzotriazole derivative was synthesized by the reaction of benzotriazole and an aliphatic amine in sodium hydroxide solution. Tests including four ball machine, copper strip corrosion, PDSC, rotating bomb oxidation and so on were carried out to study its performance of antiwear, anticorrosion and antioxidation, as well as solubility with lube base oil, especially under low temperature. The results indicate that the performance of this prepared liquid benzotriazole derivative is equal to that of the commercial solid benzotriazole derivative T406, and its low temperature solubility in lube base oil is improved significantly, thus, it can be blended with base oil better and used more conveniently compared with T406 additive.