The invention relates to a low energy dissipation, pollution-free, low corrosion coke oven gas purification process without producing waste water. The process comprises the steps that. coke oven gas is fed into the lower end of a benzol washer; wash oil is sprayed down from the top of the benzol washer to absorb benzene-type substance; purified coke oven gas is produced at the upper end of the wash oil, and rich oil is produced at the bottom of the benzol washer; b. the rich oil is heated and is fed into a benzole scrubber; pure nitrogen is heated and fed to the bottom the benzole scrubber toabsorb the benzene-type substance in the rich oil; gaseous mixture is produced at the upper end of the benzole scrubber, and lean oil is produced at the bottom of the benzole scrubber; c. water and little crude benzol are separated from the gaseous mixture through back flow and cooling; the remaining gaseous mixture is compressed, and cooled to produce crude benzol and nitrogen. The nitrogen involved in the process does not produce phenol water and is free of pollution through washing benzene, and compression recycle. The crude benzol meets the quality requirement of YB/T5022-93, and lean oilproduced after rich oil is debenzolized contains 0.2 to 0.4 percent of benzene.