NOVELTY - An environment-friendly vaporizing burner of biomass fuel, comprises a cylindrical lower furnace body; where the burner is also provided with an upper furnace body with a secondary conversion decontamination chamber; the upper furnace body is also connected with fume collecting converter; the fume collecting converter is connected with secondary conversion decontamination chamber through the through hole on upper furnace body with its diameter smaller than the secondary conversion decontamination chamber; and the side wall of fume collecting converter is provided with an oxygen supplying pipe.    USE - The environment-friendly vaporizing burner is useful for biomass fuel (claimed).    ADVANTAGE - As the biomass fuel is adopted, the environment-friendly vaporizing burner of biomass fuel is environment-friendly, economical, and practical; where it has low energy consumption, high gasification rate of the padding, high temperature of the flame flamed out by the burner, and wide raw material, making it appropriate for the rural areas. Moreover, as the environment-friendly vaporizing burner of biomass fuel is made of steel plate by welding, the manufacturing technique is simple and the structure is rational. Additionally, it is convenient to operate and it is fast to produce gas.    DETAILED DESCRIPTION - An environment-friendly vaporizing burner of biomass fuel, comprises a cylindrical lower furnace body; where the burner is also provided with an upper furnace body with a secondary conversion decontamination chamber in it; the secondary conversion decontamination chamber and the internal cavities of the furnace bodies form an integrated cavity; the upper furnace body is also connected with fume collecting converter used for collecting the fume; the fume collecting converter is connected with the secondary conversion decontamination chamber through the through hole on the upper furnace body with its diameter smaller than the secondary conversion decontamination chamber; and the side wall of the fume collecting converter is provided with an oxygen supplying pipe of the fume collecting converter connected through with the outside world.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the environment-friendly vaporizing burner of biomass fuel.