The invention discloses N-3-dimethylamino propyl-perfluorocarbon sulfonamide-containing lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil. The N-3-dimethylamino propyl-perfluorocarbon sulfonamide-containing lubricating oil is prepared from basic oil and an additive, wherein the additive is prepared from N-3-dimethylamino propyl-perfluorocarbon sulfonamide and neodymium acetate. After the N-3-dimethylamino propyl-perfluorocarbon sulfonamide and neodymium acetate are added into the basic oil, the anti-wear and friction-reducing performance is greatly improved, the antiscuffing capacity of a friction pair is enhanced, and the bearing performance of the lubricating oil is also improved. Furthermore, N-3-dimethylamino propyl-perfluorocarbon sulfonamide and neodymium acetate are easily dispersed in the basic oil, and no agglomeration phenomenon is caused.