Lubricating grease and preparation method thereof

The invention discloses lubricating grease, belonging to the technical field of lubricating agents. The lubricating grease comprises 10-30 percent of ureido thickening agent, 54-89 percent of base oil and 1-16 percent of additive, wherein the additive is tungsten disulfide. The tungsten disulfide is selected as the additive, thus compared with graphite and molybdenum disulfide in the prior art, the lubricating grease has the advantages that the friction performances such as wear resistance, friction reduction, and extreme pressure resistance of the high-temperature lubricating grease can be remarkably improved, the friction coefficient of a bearing during working at a high temperature environment can be effectively reduced, the energy consumption is reduced, the consumption of the lubricating grease can be reduced, and the work service life of the lubricating grease is prolonged; and because the tungsten disulfide added in the lubricating grease forms an adsorption film of tungsten disulfide on a metal fricti