To produce pseudo grain in good condition, to obtain good productivity of sintered ore and to improve the quality even in the case of using sintering raw material of fine grain size, dust and sintering raw material containing ≥2 wt.% Al2O3 adversely effected to the quality.

This method is the one for treating the sintering raw material containing ≥2 wt.% Al2O3 and ≥80 wt.% grain having ≤1 mm grain diameter. To a part of the sintering raw material, one kind or ≥ two kinds of dry dust and/or wet dust collected in a dust collector 8, water and slurry-state dust, are added and after adjusting the moisture, mixing and granulating with a high speed stirring mixer 10 so as to become a target moisture content, this is mixed with the remaining sintering raw material or mixture-granulated.