NOVELTY - A fuel gas cooker comprises a cooker body (1), a cooker pin (18), an outer air entering cylinder (26), an inner air entering cylinder (27), a gas entering tube (14), a tar exhaust tube (20), an igniting device (30), and a boiler bar (7). An upper extreme of cooker body, a round ring plate, and a taper cylinder are formed in an inner taper type fuel gas preheating cavity. The boiler bar is in a surface of taper cylinder. A cold-heat fuel gas separating cover is inversely installed under the round ring plate. An end of inner cylinder is protruded into the cold-heat fuel gas separating cover.    USE - A fuel gas cooker for processing crop or industrial wastes to be converted as heat.    ADVANTAGE - The fuel gas cooker is convenient to use; and maintains high transfer efficiency of gas fuel, good purifying effect of fuel gas, high heat efficiency, and enough power.    DETAILED DESCRIPTION - A fuel gas cooker comprises a cooker body (1), a cooker pin (18), an outer air entering cylinder (26), an inner air entering cylinder (27), a gas entering tube (14), a tar exhaust tube (20), an igniting device (30), and a boiler bar (7). An air quantity control plate is located in the outer cylinder. An upper extreme of cooker body, a round ring plate, and a taper cylinder are formed in an inner taper type fuel gas preheating cavity with triangular section. The boiler bar is in a surface of taper cylinder. A cold-heat fuel gas separating cover is inversely installed under the round ring plate. An end of inner cylinder is protruded into the cold-heat fuel gas separating cover. The outer and inner cylinders are abutted on a cylinder wall of cooker body. The cold-heat fuel gas separating cover is equipped with a hearth cylinder body. The cylinder wall of hearth cylinder body is open and with one gas entering hole. A fuel gas distributor is a cylinder body with a sealed and sloping lower extreme interlayer. An upper extreme of tar guide tube is connected with the lower extreme interlayer of the fuel gas distributor. The lower extreme interlayer is inserted to bottom cover of cold-heat fuel gas separating cover to lower part of cooker body. The upper extreme of hot fuel gas guide tube is connected with a fuel gas preheating cavity; and the lower extreme is inserted to cold-heat fuel gas separating cover and the hearth cylinder body and connected with the lower part of fuel gas distributor. An igniting needle is inserted to the cooker body, the cold-heat fuel gas separating cover and the hearth cylinder body, and connected to the lower part of fuel gas distributor. An INDEPENDENT CLAIM is included for a fuel gas generator for providing fuel to fuel gas cooker.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the fuel gas cooker.    Cooker body (1)    Boiler bar (7)    Gas entering tube (14)    Cooker pin (18)    Tar exhaust tube (20)    Outer air entering cylinder (26)    Inner air entering cylinder (27)    Igniting device (30)