NOVELTY - A vertical continuous microwave heating low-temperature cracking furnace includes a feeding and garbage gas exchange mechanism, a carbonized material collecting bin, a carbonized material collecting mechanism, and a machine body including a main machine barrel which comprises four dummy plates which divide the barrel into garbage preheating and cracking gas output bin, garbage moisture evaporating and heating bin, garbage main cracking bin, and cracked material carbonizing bin. Microwave-emitting sources are arranged on outer wall of main machine barrel.    USE - Vertical continuous microwave heating low-temperature cracking furnace used for treating garbage.    ADVANTAGE - The furnace enables continuous garbage treatment, has low energy consumption and low dust emission, and achieves zero emission of nitrogen oxides and dioxin.    DETAILED DESCRIPTION - A vertical continuous microwave heating low-temperature cracking furnace comprises feeding and garbage gas exchange mechanism, garbage preheating and cracking gas output bin, garbage moisture evaporating and heating bin, garbage main cracking bin, cracked material carbonizing bin, carbonized material collecting bin, carbonized material collecting mechanism, and machine body. The machine body includes main machine barrel, power spindle, spindle power wheel, spindle power motor, and frame. An upper end of main machine barrel is provided with a circular drum having conical feeding port. The power spindle is supported in the center of main machine barrel by bearing, and is connected with the spindle power motor in transmission by the spindle power wheel. The main machine barrel and spindle power motor are synchronously fixed on the frame. An upper end surface of main machine barrel has controllable cracking gas outlet and reduction gas outlet. A lower end of main machine barrel has reduction gas inlet. The main machine barrel comprises four dummy plates which divide the barrel into garbage preheating and cracking gas output bin, garbage moisture evaporating and heating bin, garbage main cracking bin, and cracked material carbonizing bin. Groups of microwave-emitting sources are arranged on outer wall of main machine barrel. Each group of microwave-emitting sources is arranged along radial section of main machine barrel and is opposite to the preheating and cracking gas output bin, moisture evaporating and heating bin, main cracking bin and carbonizing bin. A passing gap is left between center of first dummy plate and power spindle or between outer wall of first dummy plate and inner wall of main machine barrel, between center of second dummy plate and power spindle or between outer wall of second dummy plate and inner wall of main machine barrel, between center of third dummy plate and power spindle or between outer wall of third dummy plate and inner wall of main machine barrel, and between center of fourth dummy plate and power spindle or between outer wall of fourth dummy plate and inner wall of main machine barrel. The power spindle is fixed with groups of pushing rods in corresponding axle line positions of preheating and cracking gas output bin, moisture evaporating and heating bin, main cracking bin and carbonizing bin. The pushing rods comprise groups of pushing scrapers. The feeding and garbage gas exchange mechanism includes a primary feeder, and a gas exchange bin connected with inner cavity of main machine barrel by upper end surface of main machine barrel. The primary feeder and gas exchange bin have a feeding reduction gas outlet and a feeding reduction gas inlet. The carbonized material collecting bin is formed in the main machine barrel between fourth dummy plate and bottom surface of main machine barrel. The carbonized material collecting mechanism includes collecting hopper and airtight spiral discharger. One end of collecting hopper is connected with the carbonized material collecting bin by bottom surface of main machine barrel, while the other end is connected with the discharger.