The invention discloses cooling lubricating oil which comprises the following components by mass: 1-3 parts of phenylalanine, 3-4 parts of m-anisaldehyde, 1.2-1.8 parts of trilinolein, 2-4 parts of trimethyl octane, 1-3 parts of trimethyl decane, 3-6 parts of molybdenum disulfide, 2-5 parts of polytetrafluoroethylene, 20-25 parts of cobalt naphthenate, 35-45 parts of lead isocaprylate, 1.6-1.8 parts of an alpha-olefin copolymer pour point depressant, 1-3 parts of a nonionic surfactant, 1.5-2.5 parts of a clearing agent, 2-2.5 parts of a dispersing agent, 0.5-1.2 parts of an anti-wear reagent at extreme pressure, 0.6-0.8 part of an antirust agent, 0.3-0.6 part of an antioxidant, 0.1-0.15 part of a pour point depressant, 20-80PPM of an antifoaming agent, 5-9 parts of a tackifier, 0.6-0.8 part of an oxidation and corrosion inhibitor, 3-5 parts of a viscosity index improver, 0.1-0.2 part of a demulsifying agent, 0.1-1 part of nano-graphite, 10-15 parts of nano ZrO2. According to the cooling lubricating oil, friction on machinery can be effectively reduced, the machinery and machined parts are protected, mechanical impurities, carbon residue, ash content and sulphated ash are removed, the effect of cooling the machinery is extremely obvious, and the cooling lubricating oil is convenient to use and low in manufacturing cost.