Abstract: An oxygen-enriched pushing combustion technique is newly used in the furnace of a vacuum distillation unit with 5 Mt/a capacity for the first time in Dagang Company, CNPC. A special program is designed for the technique. Using this technique, the fuel consumption of the furnace is reduced by 5.95%; the oxygen content of exhaust gas is reduced from 4.54% to 2.14%. This is a high efficiency technology with less investment. The income from energy saving is 2.156 million Yuan/a. The payback period is less than 10 months.