NOVELTY - A high efficiency energy-saving and environmentally friendly dual purpose gasification furnace for firewood and coal comprising a furnace body, a feeding opening, a water jacket, and a hot water pipe; where the furnace body (1) is composed of a combustion chamber (4), a throat opening (5), an oven opening (5.1) and a heat receiver (2), is new.    USE - The furnace is useful for baths with warming by boiling water through firewood and coal.    ADVANTAGE - The invention has high efficiency, saves energy, and environmentally friendly.    DETAILED DESCRIPTION - A high efficiency energy-saving and environmentally friendly dual purpose gasification furnace for firewood and coal comprising a furnace body, a feeding opening, a water jacket, and a hot water pipe; where the furnace body (1) is composed of a combustion chamber (4), a throat opening (5), an oven opening (5.1) and a heat receiver (2); where the combustion chamber, throat opening, and oven opening are located in lower part of the furnace body; lower part of the combustion chamber is equipped with a fire opening (4.2) which is communicated to the throat opening; the throat opening is equipped over the oven opening; the fire opening is communicated to the heat receiver equipped in the furnace body through the throat opening; all the wall of the combustion chamber, fire opening and heat receiver are equipped with the water jacket (1.5, 2.2) and they are communicated mutually; interior of the heat receiver is equipped with a hot water pipe (2.1) communicated to water jacket; centre of the heat receiver is equipped with a discharge flue (3); bottom part of the combustion chamber is fire grate (4.1); upper part of the heat receiver is equipped with an outlet (3.2); and lower part of the combustion chamber is equipped with a back water opening (1.3), is new.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the gasification furnace.    Furnace body (1)    Back water opening (1.3)    Water jacket (1.5, 2.2)    Heat receiver (2)    Discharge flue (3)    Outlet (3.2)    Combustion chamber (4)    Fire grate (4.1)    Throat opening (5)    Oven opening (5.1)