NOVELTY - A spontaneous ignition biomass coke producing columnar furnace comprises a combustion chamber (1) including a combustion chamber wall (3); a drawing plate (6) arranged on middle of a ring-shaped section between combustion chamber wall and outer wall of furnace; and combustible gas reflowing pipelines (4). The ring-shaped section is divided into a carbonizing chamber (2) on upper part and a cooling chamber (5) on lower part. Each of the combustible gas reflowing pipelines has one end connected on side wall of a carbonizing chamber and other end introduced into the combustion chamber.    USE - Spontaneous ignition biomass coke producing columnar furnace.    ADVANTAGE - The furnace utilizes energy of biomass itself and avoids use of fossil energy; has simple design, low cost, high comprehensive utilization rate of energy and low carbon discharge; and is safe to operate and movable. Further, the combustible gas can be recycled, pollution to the atmosphere is reduced, and carbonizing and cooling steps can be integrated.    DETAILED DESCRIPTION - A spontaneous ignition biomass coke producing columnar furnace comprises a combustion chamber (1) including a combustion chamber wall (3) arranged in a concentric manner with the producing furnace; a drawing plate (6) arranged on middle of a ring-shaped section between the combustion chamber wall and an outer wall of the producing furnace; and combustible gas reflowing pipelines (4). The ring-shaped section is divided into a carbonizing chamber (2) on upper part and a cooling chamber (5) on lower part. Each of the combustible gas reflowing pipelines has one end connected on side wall of a carbonizing chamber and other end introduced into the combustion chamber via lower part of the drawing plate. Carbonized biomass coke falls to the cooling chamber via the drawing plate, by pushing the drawing plate to the original place such that a sealing environment is formed, thus high-temperature biomass coke can be cooled without oxygen.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the biomass coke producing furnace.    Combustion chamber (1)    Carbonizing chamber (2)    Combustion chamber wall (3)    Combustible gas reflowing pipelines (4)    Cooling chamber (5)    Drawing plate (6)