The present invention relates to a magnesium refining system, according to the present invention are provided in predetermined distance apart on the ground, and a plurality of thermal reduction of having the reaction tubes therein, to be a predetermined distance apart on one side of said plurality of thermal reduction condensing the feed conveyor and, as installed at one side of the transport conveyor material in case of charging the magnesium-producing material in the interior of the reaction tube, the magnesium vapor reduction in a plurality of the thermal reduction is installed in multi-layer so as to recover the magnesium supply means for supplying a capacitor added to the interior of the reaction tube to the transfer conveyor and, in said plurality of heat-reduction are respectively installed on the upper portion of the said raw material input case and the capacitor is supplied to the transfer conveyor through the supply means a plurality of loader means to inject or take-off in the interior of the reaction tube and, of said plurality Are installed to be spaced a predetermined distance at the other side to the thermal reduction is characterized in that comprises a taking out means for taking out a crown magnesium condensation on the interior of the capacitor.