This model iin addition to its capability to remove water,gas and impurities in oil like functions of ordinary vacuum purifier,the purifier can asle recover the inferior insulation oil,which could effectively remove the intensive oxide and free carbon,thus resumes anti-oxidation and acid /alkali water solubility characteristics,after treatment, the oil can meet the national standerd in repect of water content,withstand value,gas content,acid value and medium consumption requirement.