▎ 摘　　要

NOVELTY - Preparing oleic acid-lanthanum trifluoride-graphene composite lubricating oil anti-wear agent comprises: adding ammonium fluoride and graphene oxide to aqueous solution of ethanol, adding lanthanum nitrate solution dropwise at 60-100 degrees C for 2.5-3.5 hours; adding 120-200 ml of a saturated ethanol solution containing 2-5ml oleic acid; after 3 hours, until the product gradually cooled to room temperature after filtration, washing with deionized water and ethanol repeatedly, and finally drying at 80-100 degrees C for 12-20 hours to produce the anti-wear agent. USE - The anti-wear agent is useful for producing lubricating oil. ADVANTAGE - The process produces lubricating oil anti-wear agent that has good thermal stability and chemical stability, can prevent oxidation and react with metal in a thermal environment, provides lubricating oil with more excellent stability, lubricating property, performance, wear-resistant anti-friction performance, and can be widely used in car and other rails and other mechanical friction and wear field. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) the lubricating oil anti-wear agent prepared by the method; and (2) preparing a lubricating oil by using a lubricating oil anti-wear agent prepared by the method, comprising adding the prepared lubricating oil anti-wear agent to the base oil at a different mass ratio, where the base oil comprises 0.01-2% dispersant and 0.01-1% emulsifier, the milling time is 10-30 minutes, then carrying out the ultrasonic dispersion for 10-30 minutes, and then stirring the mixture thoroughly to obtain the lubricating oil.