The invention discloses an extraction mechanism for a petrochemical industry production buffer tank. The extraction mechanism comprises an extraction cylinder, an extraction pipe is arranged on the upper left portion of the extraction cylinder, a square block is arranged at the top of the extraction pipe, a liquid inlet groove is formed in the square block, a filtering component is arranged in the liquid inlet groove, and a heating component is arranged in the extraction cylinder. Through cooperative use of the extraction cylinder, the extraction pipe, an oil pump, the square block, the liquid inlet groove, a filtering part, a motor, a rotating shaft, a first groove, a spiral blade, a hollow groove, a circular opening, an exhaust pipe, a heater and a sealing part, the problems that an existing extraction mechanism is not provided with a heating device, the oil extraction efficiency is reduced, impurities in oil are not filtered, and impurities are left in the buffer tank are solved.