Lubricating oil composition used for jacks, and preparation method thereof

The invention provides a lubricating oil composition used for jacks. The lubricating oil composition comprises 0.02-0.08wt% of an extreme pressure anti-wear additive, 0.3-1.2wt% of an oxidation and corrosion inhibitor, 0.04-0.1wt% of an antioxidant, 0.01-0.1wt% of an antirust agent, 0.001-0.08wt% of a deemulsifier, 0.0005-0.05wt% of an antifoaming agent, 0.2-0.8wt% of a pour point depressant, and the balance of base oil. The lubricating oil composition has suitable viscosity index and good viscosity temperature performance, ensures uniform force bearing of working parts of the jacks under different environment and working conditions, also has the advantages of good lubrication performance, good low temperature resistance, excellent rubber compatibility, and good corrosion and oxidation resistance, and is suitable for working of the jacks in wild and strict working environment places.