NOVELTY - A garbage cracking furnace comprises gear chamber composed of gear motor, driving gear and driving gear shaft which is opened at lower part of furnace body, furnace body, material conveying tube which is connected with upper part of outer side wall of furnace body, material conveying piston which is arranged in material conveying tube, piston motor, regenerated fuel gas output tube, air extractor which is connected to other end of regenerated fuel gas output tube, regenerated fuel gas storing chamber, and slag discharging tube which is connected with bottom of lower side of furnace body.    USE - Garbage cracking furnace.    ADVANTAGE - The garbage cracking furnace is high in efficiency, capable of saving energy and environment-friendly, reclaims regenerated fuel gas and processes garbage without harm.    DETAILED DESCRIPTION - A garbage cracking furnace comprises gear chamber composed of gear motor, driving gear and driving gear shaft which is opened at lower part of furnace body, furnace body, material conveying tube which is connected with upper part of outer side wall of furnace body, material conveying piston which is arranged in material conveying tube, piston motor, regenerated fuel gas output tube, air extractor which is connected to other end of regenerated fuel gas output tube, regenerated fuel gas storing chamber, and slag discharging tube which is connected with bottom of lower side of furnace body. The driving gear shaft runs through axle hole at top part of gear chamber and stretches into furnace body. The inner part of furnace body close to furnace bottom is provided with stirring cutter connected with driving gear shaft stretching inside from gear chamber and three fire grates. The lower part of outer side wall of furnace body is respectively provided with igniting hole, temperature detecting hole and observing hole. The outer end of material conveying piston is provided with piston motor. One end of regenerated fuel gas output tube is connected with top part of furnace body.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the garbage cracking furnace.