Energy-saving and environmental friendly straw gasification furnace

The utility model provides a gasification furnace, particularly to an energy-saving and environment-friendly straw gasification furnace which generates flue gas through igniting raw materials such asfirewood, wood and animal wastes and then burning the raw materials in a main combustion chamber. The gasification furnace comprises a furnace body, a water jacket is arranged at the periphery of thefurnace body, and a heating water outlet, a heating water return port and a tap water inlet are formed on the water jacket; an evaporation chamber, a main combustion chamber, an after-burning port, aheat collection chamber and a chimney flue are arranged inside the furnace body; the evaporation chamber is communicated with the main combustion chamber via an air outlet; a grate is arranged at thebottom part of the main combustion chamber, a secondary oxygen feed port is arranged on the side surface of the main combustion chamber, and a one-step oxygen feed port is arranged below the grate; the main combustion chamber is