In order to improve lithium complex lubricating and high temperature properties,the lithium complex grease was prepared by onestep method with the use of silicone oil and mineral oil as base oil,12hydroxy stearic acid,adipic acid and lithium hydroxide as the materials of thickening agent.The effects of the amount of base oil,compound ratio of thickening agent,saponification temperature,saponification time,maximum refining temperature,mixed ratio of silicone oil and mineral oil were studied through characterizing the main parameters of dropping point,cone penetration and oil separation of steel netting method.The results show that the combination of silicone oil and mineral oil improves the dropping point of the lithium complex greases,and lowers the separation and evaporation loss.The proper amount of silicone oil can reduce the friction coefficient of the greases.