Coal pretreatment method and system for coal blending coking

The invention relates to a coal material pretreatment method for coal blending coking, which comprises the following steps: S1, winnowing blended coal materials into small-particle coal powder through hot air, and crushing large-particle coal materials which are not winnowed into a crusher; s2, collecting small-particle pulverized coal, adding a tackifier into the small-particle pulverized coal, and performing cold press molding to obtain briquettes or coal briquettes; and S3, mixing the coal crushed by the crusher in the step S1 with the briquettes or coal briquettes prepared in the step S2, and sending the mixture to a coal tower for temporary storage or sending the mixture to a coke oven for coking. According to the coal pretreatment method and system, the hot air winnowing technology is adopted to reduce the moisture of the coal and reduce the energy consumption of the crusher, so that small-particle pulverized coal originally existing in the coal is prevented from being excessively refined, and the loss