Machine tool lubricating oil

The invention discloses a machine tool lubricating oil which is prepared from the following raw materials in parts by weight: 100 to 200 parts of machine oil, 6 to 10 parts of sodium stearate, 10 to 15 parts of triethanolamine oleate, 2 to 5 parts of benzotriazole, 5 to 10 parts of ethylene oxide, 1 to 4 parts of monopotassium phosphate, 1 to 3 parts of petroleum sodium sulfonate, 2 to 4 parts ofsodium citrate, 2 to 5 parts of sodium dodecyl benzene sulfonate, 2 to 5 parts of polyoxyethylene ether, 5 to 8 parts of trifluoromethyl oxirane, 3 to 8 parts of zinc sulfate, 2 to 7 parts of calciumcarbonate, 3 to 8 parts of chlorinated paraffin and 3 to 8 parts of methylsalicylic acid. The lubricating oil disclosed by the invention still can be well attached onto a cutting edge of a common cutter at a high temperature of 800 DEG C, so that the common cutter can normally cut a high-hardness material, and the service life of the cutter is greatly prolonged; furthermore, the constitution components of the lubricating o