The invention discloses a method for preparing lump coal by adopting biomass as raw material and relates to the preparation method for the lump coal. The method comprises the following steps: (1) crushing straws into thick-filament straws, and crushing firewood and twigs into sawdust; (2) mixing the thick-filament straws and the sawdust, then, soaking the mixture with an aqueous alkaline solution, then, fermenting the mixture, and then, continuing to ferment under the condition of high-speed stirring; (3) crushing cattle manure and combustible refuse in municipal domestic waste, then, adding the crushed material into a fermentation softening solution, soaking the crushed material, and then, fermenting for 6 to 10 hours; (4) standing the fermented solution, and filtering out moisture, thereby obtaining viscous biomass slurry; (5) crushing barks, then, adding water to the crushed barks, heating, and then adding starch; and (6) uniformly mixing coal slurry, a binder and the biomass slurry which are in the mass ratio of 1 to (2 to 3) to (40 to 45), and then, carrying out compacting molding at molding pressure, thereby obtaining the finished product. The method disclosed by the invention has the advantages that the method is low in cost and easy to operate, and the product is easy to mold, high in mechanical strength, difficult in slag-bonding and little in smoke dust.