The invention relates to a method of producing metallurgical cokes by utilizing coal rock indexes. The method comprises the following steps: setting and controlling conventional indexes of mixed coals; setting and controlling the coal rock indexes of the mixed coals; and controlling the coal rock indexes and the conventional indexes of the mixed coals so as to control fat coals and coking coals within a proper proportion limit. According to the method disclosed by the invention, by controlling the coal rock indexes and the conventional indexes of the mixed coals, the fat coals and the coking coals are controlled within the proper proportion limit, so that on the basis of a top coal loading coking process, a coking coal blending method of maintaining high-strength metallurgical cokes is realized, and the problems that coking coal blending guided by a coal petrology theory is difficult to operate in production, and the advantages of coking coal blending guided by coal petrology can not be exerted are solved.