The invention relates to a biomass fuel processing method, which c comprises: crushing wheat straw, corn straw, corn cob, bean straw, rice straw, reed stems, wood chips, wood blocks, branches, leaves, husks, fruit residue, bagasse, sunflower straw, hay, bran, wheat bran or waste paper into scraps, adding 14-18 parts by weight of water, 2-5 parts by weight of a binder, and 80-85 parts by weight of the crushed biological material to a container, stirring, heating to a temperature of 120-160 DEG C, compressing the material to achieve 1/20-1/30 of the original stacking volume, preparing the material into the block-like material or granular material, and carrying out air-drying or drying on the block-like material or granular material. A purpose of the present invention is to provide the processing method of the biomass fuel with characteristics of rich source, low raw material cost, high combustion value, long combustion time, small storage occupation space, no rotting, and low transporting cost, and the product thereof.