NOVELTY - A fuel gas is prepared by grinding straw in extrusion cylinder, adding coal powder, granulating in reaction chamber, heating in cavity to extract wax, repeatedly grinding in roller to obtain pellets, heating pellets in furnace hole to obtain cylindrical particles, polishing, heating to release carbon dioxide and carbon monoxide, oxidizing layer, reducing to release carbon monoxide, sintering, subjecting to grate rotation, scraping, heating using steam, and subjecting to gasification by extruding ash particles at high temperature in furnace with gasket and rolling grinder.    USE - Preparation of fuel gas (claimed).    ADVANTAGE - The preparation method is highly efficient and uses small amount of solvent.    DETAILED DESCRIPTION - A fuel gas is prepared by grinding straw at 300-900 degrees C in extrusion cylinder with furnace (14) connected to inner mill plate (8) and hole (9), heating at 300-900 degrees C in outer mill plate (12), heating at 300-600 degrees C in reaction chamber (28) with cavity to obtain crushed straw with 15-30% moisture content, adding 25 mm coal powder, granulating in reaction chamber, heating at 200-600 degrees C in cavity to extract wax, increasing temperature to 200 degrees C, repeatedly grinding in roller to obtain 15-30 mm pellets, heating pellets at 300-900 degrees C in furnace hole to obtain 0.7-3 m cylindrical particles, polishing with 200-300 m3/t heat release to obtain 0.9-1.8 m layer, heating at 1200 degrees C to release carbon dioxide and carbon monoxide, heating at 900 degrees C to obtain 0.3-1.2 m thick layer, oxidizing to release carbon dioxide, reducing to release carbon monoxide, sintering to obtain 1.3-2.2 mm layer, subjecting to grate rotation to obtain 100-200 mm layer, scraping, heating using steam to distribute ash particles uniformly, and subjecting to gasification by extruding ash particles at high temperature with 30-60 kg/cm2 hole friction in furnace with gasket and rolling grinder. An INDEPENDENT CLAIM is included for device for preparing fuel gas which comprises 1200 mm ring aperture, shelf (5), plane (7), rack (6), roller (4), axis(1), outer cylinder (11) with base (10) and bearing (20), outer tube with base (13), shaft (15), rotating grinder (18), mill plate (8), 500 mm coil bobbin (2), spiral leaf (3) and groove (21).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of device for preparation of fuel gas. (Drawing includes non-English language text).    Axis (1)    Bobbin (2)    Spiral leaf (3)    Roller (4)    Shelf (5)    Rack (6)    Plane (7)    Inner mill plate (8)    Furnace hole (9)    Base (10)    Outer cylinder (11)    Outer mill plate (12)    Outer tube base (13)    Furnace (14)    Shaft (15)    Rotating grinder (18)    Bearing (20)    Groove (21)    Reaction chamber. (28)