Abstract: The DHT-1 hydrorefining catalysts for diesel oil hydrogenation based on γ-Al2O3 modified by carbon black is introduced. The envaluation results showed that its hydrogenation activity was a little better than the reference catalyst. When combining it with a kind of hydrodewaxing catalyst for processing Daqing diesel oil，the tests results showed that the yield of diesel fuel was more than 93.0 wt%，the sulfur content was lower than 50.0µg/g，the freezing point was lower by 19.2℃，and the cetane number increased by 1.0 to 3.4. All of these show that the DHT-1 catalyst can be well matched with the hydrodewaxing catalysts.