NOVELTY - Production of biomass dry-run carbon and biomass fuel gas comprises: (1) setting gasification reacting chamber and material adding tube, adding material, sealing, opening air inlet tube, starting negative pressure Roots blower, opening oven door, firing and closing oven door; (2) diffusing gas to dry-run carbon chamber gas diffusing opening; (3) feeding the biomass carbon and scraping the biomass dry-run carbon; and (4) releasing methane, carbon monoxide, hydrogen, high heating hydrocarbon series in volatilized gas and mixing with fuel gas with about 6000kJ/m3 heat value.    USE - The process is useful for generating power by fuel gas generator group or by residents to burn in order to generate clean and cheap biomass fuel gas.    ADVANTAGE - The biomass fuel generated is clean and cheap.    DETAILED DESCRIPTION - Biomass dry-run carbon and biomass fuel gas is manufactured by: (1) setting gasification reacting chamber in the centre part of the dry-run carbon chamber in the same oven and setting a material adding tube on the top of the oven, adding material to the gasification reacting chamber in oven and dry-run charring chamber through the material adding tube, closing the material adding sealing valve, opening the air inlet tube at the bottom of the gasification reacting chamber in oven, starting negative pressure Roots blower set outside the oven, opening the oven door at the lower part of the gasification reacting chamber, closing the oven door after firing the gasification material; (2) on the effect of the negative pressure Roots blower outside the oven, the 500-700 degrees C gas having and lack of oxygen generated in the extracting gasification reacting chamber diffuses to the dry-run carbon chamber set around the gasification reacting chamber through the fuel gas diffusing opening on the upper portion of the gasification chamber in order to dry the charring material to obtain biomass carbon; (3) the biomass carbon enters the carbon collecting chamber on the lower part of the dry-run charring chamber, scraping the biomass dry-run carbon in the carbon outlet tube set on the bottom of the carbon collecting chamber through the carbon scraping plate set on the bottom of the carbon collecting chamber and outlet outside the oven, the biomass dry-run product is achieved; and (4) releasing methane, carbon monoxide, hydrogen, high heating hydrocarbon series in volatilized gas when the material is drying in the dry-run charring chamber, mixing them with the fuel gas generated by gasification reacting chamber with about 6000kJ/m3 heat value.    DESCRIPTION OF DRAWING(S) - The drawing shows device for manufacture of biomass dry carbon and biomass fuel.