In this paper, a research on adding dusts of blast furnace (DBF) which contains iron and carbon to the coal blend was carried out on 5 Kg coke oven. The influences of addition amount (0.25%~1.25%) and size distribution (0~2.5 mm) for DBF on the quality of the coke were investigated. The results showed that the influence on the quality of the coke was little when amount of DBF was less than 0.25% and particle size was from 0.5 mm to 1 mm, but the quality of the coke decreased obviously when addition amount was more than 0.25% and the size was larger than 1 mm.