NOVELTY - Biomass rotary dry distillation comprehensive utilization includes e.g. selecting no-rot and deterioration solid biomass raw material, starting initially dry distillation machine system, using high temperature carbonization air blowing box air source derived from furnace, starting air blower, heating, entering hot air through the hot air blowing boxes, entering cryogenic air exhaust box, outflowing biomass fuel gas generated in first heat exchanger, heating, transporting qualified biomass raw material, generating biomass coal and biomass fuel gas, and carrying out gravity separation.    USE - The method is used for biomass rotary dry distillation comprehensive utilization (claimed).    ADVANTAGE - The method can realize continuous production of biomass fuel gas, is suitable for large scale industrial production, saves energy, is environmentally friendly, can eliminate impurities, increase purity, concentration and thermal value of the biomass fuel gas, and can greatly increase production efficiency.    DETAILED DESCRIPTION - Biomass rotary dry distillation comprehensive utilization includes (a) preparing materials: selecting no-rot and deterioration solid biomass raw material and biomass solid water content is not greater than 18%, soil weight is not greater than 3%, length not greater than 75mm, (b) air heating, transporting, circulating: starting initially dry distillation machine system, using high temperature carbonization air blowing box air source derived from furnace, starting at low temperature air exhausting air blower, heating air blower by hot air of 640-660 degrees C, entering in hot air through the hot air blowing boxes, distillation tail point wind box, retorting machine hot air ducts, distillation head polymerization wind box, entering cryogenic air exhaust box and then entering first heat exchanger again after injection into the furnace, outflowing biomass fuel gas generated in first heat exchanger in hot air with fuel gas combustion machine before heating to 640-660 degrees C high temperature air input blast box, using hot air circulation use and stop heating furnace operation, in carbonization machine, (c) transporting qualified biomass raw material, lifting height to the design after the material landing in the conversion starting raw material conversion box sealing valve switch, making raw material enter into hopper, feedstock machine for raw material from hopper continuous input to dry distillation machine cylinder, (d) biomass destructive distillation, distillation machine terminal to feedstock carbon discharging end from high to low incline, adding in hot air raw material dry mixing machine and continuous rotation, machine adopts the sleeve type structure and gas separation, hot air in dry distillation machine through multiple radiating heat pipe, heat pipe radial biomass raw material for carrying out heat radiation, placing raw material in dry distillation cylinder and multi-radiating via heat pipe, high to low drop overturning heating generating biomass coal flow to out coal machine, after the dry distillation process of biomass raw material generate the biomass coal and biomass fuel gas, through high temperature gas coal separator of blowing part, carrying out gravity separation and centrifugal separation, (e) tar splitting, in function of the draught fan below, biomass fuel gas from gas coal separator enter into tar cracking, because of tar cracking cavity body in continuous injection fixed carbon, and diesel oil combustion engine on tar cracking, oxygen in air and biomass fuel gas after fuel gas burner for the second heat exchanger input, igniting oxidizing agent, radiating the carbon high temperature cut off become small gaseous state molecule, reducing oxygen content of the biomass fuel gas, eliminating fuel gas and tar corrosion and blocking of equipment and pipeline, and increasing biomass gas value, (f) biomass fuel gas cooling, purification and application: biomass fuel gas tar cracking, through heat exchanger enter into spray tower again draught fan is sent to air storage tank, used for boiler, power generation gas through water separator, drying, and collecting, and (j) biomass coal cooling, measuring and packaging.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the biomass dry distillation process (Drawing includes non-English language text).