Method for increasing coal and reducing coke of blast furnace

The invention provides a method for increasing coal and reducing coke of a blast furnace. A powder making system and a powder delivering system communicate with each other and are connected with each other, pelletizing with a ball disc is changed into pelletizing with a large mixer, and ingredients are introduced into returned ores of the blast furnace; the area of a tuyere of the blast furnace is reduced, and a distribution matrix moves to an inner ring in a unified manner at an angle of 1.9-2.1 degrees; a coke rate of the center becomes 5.5 cycles from 4 cycles, and gradually returns to 4 cycles after 5-10 days; the temperature of a 2,580 m blast furnace throat is controlled to be 120-180 DEG C, and the temperature of a 3,200 m blast furnace throat is controlled to be 40-80 DEG C; a coke nut discharge position is located on a middle rear section of an ore batch, and the coke nut rate is increased to be 63-66 kg/t iron. By the method, the coke rate can be reduced by 15 kg/t iron, the coal rate can be increas