In the metallurgical production process,the hydraulic and lubrication system plays an important role in the normal operation of the equipment,Therefore,the control of oil purification is a long-term continuous work faced by various enterprises.The most common purification methods are filtration and vacuum filtration.Comparative analysis was carried out according to the principle and advantages and disadvantages.Filtration and vacuum filtration methods had general purification effect,low cost-effective,less applicable conditions and other shortcomings,while using centrifugal oil purification method can really achieve high efficiency and low consumption of purification.The centrifugal oil purification method was investigated,trial run and operation tracked.The test data show that the centrifugal purification method can really meet the needs of oil purification of hydraulic oil in front of the furnace.