NOVELTY - A multifunctional gasification furnace comprises a decomposition furnace (1) with a fan (19), a separator (2) and a combustion furnace (3) which are connected in series by pipelines, where lower end of the decomposition furnace is a conical furnace bottom having a slag receiving cylinder (18). Upper end of the decomposition furnace is provided with a feeding orifice (11). The conical furnace bottom above the slag receiving cylinder is provided with a conical structure (16).    USE - A multifunctional gasification furnace.    ADVANTAGE - The furnace is quick to ignite, is reliable to use, and uses different low cost fuel sources including firewood and inflammable waste materials. The use of the furnace helps farmers increase their income.    DETAILED DESCRIPTION - A multifunctional gasification furnace comprises a decomposition furnace (1) with a fan (19), a separator (2) and a combustion furnace (3), which are connected in series by pipelines, where lower end of the decomposition furnace is a conical furnace bottom having a slag receiving cylinder (18). Upper end of the decomposition furnace is provided with a feeding orifice (11). The conical furnace bottom above the slag receiving cylinder is provided with a conical structure (16). A first annular temperature regulating box (12) is sleeved on the furnace body at the lower end of the feeding orifice. A second annular temperature regulating box (13) in communication with the first temperature regulating box through a tube is sleeved on the first temperature regulating box. The furnace body below the first temperature regulating box is internally connected with third annular temperature regulating box tightly attached to the inner wall of the furnace body by a connecting tube. A cylindrical housing of separator is divided into upper and lower cavities using a partition plate, where lower end of the lower cavity is provided with a waste discharging tube. The upper cavity of the housing is provided with upper and lower separating plates with Y-shaped sections. The housing of the combustion furnace is cylindrical, where the upper bottom surface is a furnace door. Its center is provided with an igniting tube which is vertically fixed to the lower bottom surface of the housing through its lower end.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a multifunctional gasification furnace.    Decomposition furnace (1)    Separator (2)    Combustion furnace (3)    Feeding orifice (11)    First annular temperature regulating box (12)    Second annular temperature regulating box (13)    Conical structure (16)    Slag receiving cylinder (18)    Fan (19)