NOVELTY - The combustible gas preparation device includes a furnace body (1), a material inlet (2) provided at upper part of the furnace body, a combustible gas outlet (3) and a waste material outlet (4) provided at the lower part. The furnace body is connected to a microwave heating device (6) and an agitating device (7) for turning the straw. A device control box (11) is provided out of the furnace body, and is electrically connected to a gas monitor (12) and a device operation monitor (13). The material inlet and waste material outlet are provided with sealing plates (5).    USE - Combustible gas preparation device used in producing combustible gas by burning straw at high temperature.    ADVANTAGE - Ensures that the furnace body of the combustible gas preparation device can reach the required temperature for cracking and gasifying the straw quickly by the heating of the microwave heating device because the furnace body is connected to the microwave heating device with short straw gasifying time, total cracking process, high gas production rate, easy temperature control, improved use safety and reliability. Ensures that the furnace body is connected to the agitating device which works together with the microwave heating device asynchronously through the agitating device. Prevents the agitating device from interfering the microwave in the furnace body so as to heat the microwave heating device. Ensures better heating effect of the furnace body, safer use, and shorter gasifying time of the straw. Ensures that the combustible gas preparation device has reasonable design, good tightness and easy control.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic illustration of the combustible gas preparation device.    Furnace body (1)    Material inlet (2)    Combustible gas outlet (3)    Waste material outlet (4)    Sealing plates (5)    Microwave heating device (6)    Agitating device (7)    Device control box (11)    Gas monitor (12)    Device operation monitor (13)