Method for manufacturing green solid fuel by using biomass mixed material

The invention discloses a method for manufacturing a green solid fuel by using a biomass mixed material, and belongs to the technical field of solid fuels manufactured by using biomass. The method comprises the following steps of: crushing, adding, heating, cooling and extruding, namely crushing the biomass mixed material into granules of which average diameter is 10 to 30 millimeters, adding 5 to 20 mass percent of water, 5 to 30 mass percent of pulverized coal, 1 to 3 mass percent of calcined lime and 5 to 10 mass percent of sodium carboxymethylcellulose into the granules, heating for 1 to 3 hours with stirring at the temperature of between 150 and 250 DEG C, cooling the mixture at the cooling rate of 20 to 30 DEG C per minute, and finally extruding the mixture into the solid fuel. The method has the advantages that: many mixtures such as straw biomass, waste plastic, urban organic solid wastes and the like are used as raw materials for low heat treatment, and the green solid fuel with high specific weight,