Abstract: Physical and chemical properties of heavy oily sludge in Shengli oil field are studied in this paper. Based on the analysis of oily sludge composition and hazardness, high-temperature combustion technology of heavy oily sludge is put forward. Mixing and burning of atomized coal-water slurry and oily sludge is realized in a special combustion furnace. By using the fluidized bed, two-stage flue gas treating system and dust recovering system, the secondary pollution of the harmful gas emission is effectively eliminated and the tail gas quality can meet the national standards. The technology can not only realize harmless treatment, but also realize recycling of resource, it therefor has good environmental significance and economic benefit.