Abstract: With more and more attention to environmental protection, the emission standard of volatile organic compounds in refineries has been continuously improved. The mass concentration emission limit of volatile organic compounds for oil and gas treatment facilities has been reduced from 25 g/m³ to less than 120 mg/m³. Therefore, it is difficult for existing oil and gas recovery devices to adapt to current situation. Some common processes of oil and gas recovery unit in refinery were introduced, and a technical upgrading and transformation scheme which could meet new standard of volatile organic compounds emission was proposed. After the first stage of transformation, the mass concentration of non-methane hydrocarbons was less than 73 mg/m³, and the removal rate of volatile organic compounds reached 99.96%.