NOVELTY - Preparation of straw coal comprises crushing corn straw through crushing hammer to 200 meshes, crushing straw and rice water at ratio of 7:3, sending to hammer head crushing to 200 meshes, putting mixed material into drying machine, and drying until water content of less than 8%; putting maize straw and rice into crusher, and putting material through pipeline and material drying cylinder; and feeding into straw coal forming machine, crushing and drying material, under more than 480 MPa, heating at 330 degrees C, and extruding material.    USE - Method of preparation of straw coal (claimed).    ADVANTAGE - The method utilizes biomass regeneration energy, is clean and environment-friendly, and has low cost.    DETAILED DESCRIPTION - Preparation of straw coal comprises crushing corn straw through crushing hammer to 200 meshes, crushing straw and rice water at ratio of 7:3, sending to hammer head crushing to 200 meshes, putting mixed material into drying machine, and drying until water content of less than 8%; putting maize straw and rice into crusher, crushing material through pipeline and material drying cylinder, material drying cylinder provided with heat channel, heat energy passage connected with drying furnace from drying cylinder connected with chimney, and equipped with heat energy feeder at front end of material drying channel, heat energy absorbing fan; entering dried material through material channel, corresponding to material inlet set with material suction fan, placing material outlet into straw coal forming machine; and feeding into straw coal forming machine, crushing and drying material by spiral propeller blade of straw coal forming machine, under more than 480 MPa, heating at 330 degrees C, and extruding material until density of culture at 1.2-1.4 ton/m3.    DESCRIPTION OF DRAWING(S) - The drawing shows a plan view of the preparation of straw coal.    Crusher (2)    Drying furnace (4)    Heat channel (5)    Crushing material (6)    Material drying cylinder (7)    Material channel (9)    Material outlet (11)