An RDF(Refuse Derived Fuel) automatic burning device is provided to improve economical profit and environment by producing fuel from refuse and using the RDF in general. In an RDF automatic burning device, a fuel supply incineration plate(17) and a transferring screw(18) are installed vertically in a lower part of a combustion chamber. A fuel adjusting plate(15) is attached to an upper part of a screw blade. The fuel supply incineration plate and the fuel adjusting plate are adjusted to control an amount of fuel. The transferring screw rotates at lower speed by a decelerating motor to push a fuel between the fuel supply incineration plate and the fuel adjusting plate. Incineration ashes fall through a hole of a lower end of the fuel supply incineration plate to separate a fuel from incineration ashes.
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