The invention discloses PET (polyester) high-speed spinning finish oil, which comprises the following components in parts by weight: 66-74 parts of smoothing agent, 10-14 parts of emulsifier, 4-8 parts of antistatic agent, 6-10 parts of tow collecting agent and 3-5 parts of additive, wherein the smoothing agent comprises phosphate, polyacrylic ester, and any one or a mixture of plant oil, animal oil, mineral oil and synthetic ester oil, the emulsifier comprises an alkyl ether type surfactant, castor oil polyoxyethylene ether and polyoxyethylene ether laurate, the antistatic agent comprises the cationic surfactant of an ammonium salt and octadecanol phosphate potassium salt, the tow collecting agent comprises polyethylene glycol laurate diester, propylene glycol and rubber pyrolysis oil, and the additive comprises talcum powder, fatty alcohol, fatty acid and acrylic acid. By means of the design disclosed by the invention, the frictional factor is more stable and the oil film strength and the oil flash point are both higher.