The invention discloses a preparation method of high-content metallized agglomerate for a blast furnace and belongs to the technical field of iron making. Raw materials are composed of ultrafine ironconcentrate powder, anthracite smalls and weak-caking bituminous dust, wherein the average particle size of iron ore powder is 1-5 [mu]m, and the average particle size of mixed coal dust is 50-100 [mu]m. After the raw materials are fully mixed, an organic binding agent and water are added at a certain proportion, and the mixture is pressed by a ball pressing machine to form raw agglomerate; and the raw agglomerate is roasted according to certain temperature rules under the condition of air isolation or N2 shielding, so that the high-content metallized agglomerate is obtained. The carbon content of the high-content metallized agglomerate is 20-40 wt%, and the high-content metallized agglomerate has good cold strength, post-reaction crush resistance and great CO2 reactivity. In production ofthe blast furnace, by adding the high-content metallized agglomerate to an iron-containing ore material layer at a proper proportion, the coke ratio and energy consumption of the blast furnace are reduced advantageously, and meanwhile ventilation of the blast furnace is not affected. As a carbon source of the high-content metallized agglomerate is weak-caking bituminous coal and anthracite, usageof noncaking coal in blast furnace ironmaking is extended advantageously, and the dependence of blast furnace ironmaking on coke is reduced.