Abstract: The technical transformation of changing coking gasoline and diesel hydrotreating unit to aviation kerosene hydrotreating unit of a certain petrochemical company was introduced. The calibration results showed that after technical transformation, the refined aviation kerosene met the quality specification of No.3 jet fuel using FHUDS-2 hydrofining catalyst at the process operation conditions of reactor inlet temperature 257.2 ℃, reaction pressure 3.03 MPa, volume space velocity 1.58 h^-1, and hydrogen to oil ratio 208.1. The unit energy consumption was 840.90 MJ/t, which was 53.99 MJ less than design value. The yield of refined aviation kerosene reached 99.91%, the unit was stable in operation, and the technical transformation achieved expected purpose.