NOVELTY - A multi-level oxygen-in type multi-functional biomass dry distillation quick carbide furnace comprises a furnace body (1), a furnace cover (2) and a net-like clapboard (3); where inside of furnace body (1) is divided into an upper cavity and a lower cavity by the net-like clapboard (3); the top end of the furnace body (1) is sealed by the furnace cover (2) which is equipped with a feeding channel (4) and an exhaust channel (5); the ends of the feeding channel (4) and the exhaust channel (5) are all equipped with small sealing covers (6).    USE - The multi-level oxygen-in type multi-functional biomass dry distillation quick carbide furnace is useful for industrial applications.    ADVANTAGE - The multi-level oxygen-in type multi-functional biomass dry distillation quick carbide furnace ensures complete decomposition of the biomass material and possesses high utilization rate of biomass material, fast reaction and abundant output; besides, it can obtain different biomass products at the same time.    DETAILED DESCRIPTION - A multi-level oxygen-in type multi-functional biomass dry distillation quick carbide furnace comprises a furnace body (1), a furnace cover (2) and a net-like clapboard (3); where inside of furnace body (1) is divided into an upper cavity and a lower cavity by the net-like clapboard (3); the top end of the furnace body (1) is sealed by the furnace cover (2) which is equipped with a feeding channel (4) and an exhaust channel (5); the ends of the feeding channel (4) and the exhaust channel (5) are all equipped with small sealing covers (6); where a fan (7) is arranged outside the bottom of the furnace body (1), with an air outlet connected with the inlet of a gate valve (8) whose outlet is connected with the lower cavity in the furnace body (1); the furnace cover (2) is connected with an air outlet pipe (9) whose one end is connected with the upper cavity in the furnace body (1) and its other end orderly passes through a cooling pool (10) and a vinegar tar pool and is connected with a combustion chamber (11); the bottom of the air outlet pipe (9) in the vinegar tar pool is connected with a branch pipe (12), through which the air outlet pipe (9) is connected with the vinegar tar pool.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a multi-level oxygen-in type multi-functional biomass dry distillation quick carbide furnace.    Furnace body; (1)    Furnace cover; (2)    Net-like clapboard; (3)    Feeding channel; and (4)    Exhaust channel (5)