Fuel blending control method and device of boiler, boiler and storage medium

The embodiment of the invention discloses a fuel blending control method and device of a boiler, the boiler and a storage medium, and relates to the technical field of energy. The method comprises the following steps: determining a standard blending proportion according to design parameters of a boiler, characteristic data of blended coal and characteristic data of high-alkali coal; respectively determining fuel blending data corresponding to each coal mill unit according to the standard blending proportion; and the coal conveying system is controlled to convey blended coal and high-alkali coal to the corresponding coal mill units according to the fuel blending data. According to the technical scheme provided by the embodiment of the invention, the standard blending proportion and the fuel blending data corresponding to each coal mill unit are determined according to the design parameters of the boiler and the characteristic data of the coal, so that a non-designed high-alkali coal burning unit can burn the h