A vacuum refining furnace for nonferrous metal multicomponent alloy, the vacuum refining furnace comprising: a furnace body, a graphite heater, a connecting base, an electrode, and a sealed furnace housing; the furnace body comprising: an evaporation laminate, a plurality of graphite condensing casings, and a graphite insulating casing; the graphite heater comprising a heating pin; and the evaporation laminate comprising a plurality of evaporators; characterized in that the evaporation laminate is nested within the graphite insulating casing, and the graphite insulating casing comprises a plurality of through holes; the graphite condensing casings have different diameters from one another; the graphite insulating casing is nested within the graphite condensing casing having a smallest diameter; each of the graphite condensing casings except for the graphite condensing casing having the largest diameter is nested within one of the graphite condensing casings; and each graphite condensing casing that is nested within one of the graphite condensing casings has a smaller diameter than the one of the graphite condensing casings it is nested within; all the graphite condensing casings except for the graphite condensing casing having the largest diameter comprise a plurality of through holes; the heating pin and the connecting base are connected to each other via a graphite bolt; the vacuum refining furnace further comprises a positioning member; and the positioning member is disposed on the connecting base; the positioning member comprises a first side surface and a second side surface; the connecting base comprises a third side surface and a fourth side surface; the second side surface is disposed between the first side surface and the third side surface and is oblique with respect to the first side surface and the third side surface; each of the heating pin, the graphite bolt, and the electrode comprises a side surface; the side surface of the heating pin is in contact with the first side surface of the positioning member, the side surface of the electrode is in contact with the third side surface of the connecting base, and the side surface of the graphite bolt is in contact with the fourth side surface of the connecting base; an area of the third side surface is substantially the same as an area of the fourth side surface; and the first side surface, the third side surface, and the fourth side surface are substantially parallel to one another. the evaporation laminate is nested within the graphite insulating casing, and the graphite insulating casing comprises a plurality of through holes; the graphite condensing casings have different diameters from one another; the graphite insulating casing is nested within the graphite condensing casing having a smallest diameter; each of the graphite condensing casings except for the graphite condensing casing having the largest diameter is nested within one of the graphite condensing casings; and each graphite condensing casing that is nested within one of the graphite condensing casings has a smaller diameter than the one of the graphite condensing casings it is nested within; all the graphite condensing casings except for the graphite condensing casing having the largest diameter comprise a plurality of through holes; the heating pin and the connecting base are connected to each other via a graphite bolt; the vacuum refining furnace further comprises a positioning member; and the positioning member is disposed on the connecting base; the positioning member comprises a first side surface and a second side surface; the connecting base comprises a third side surface and a fourth side surface; the second side surface is disposed between the first side surface and the third side surface and is oblique with respect to the first side surface and the third side surface; each of the heating pin, the graphite bolt, and the electrode comprises a side surface; the side surface of the heating pin is in contact with the first side surface of the positioning member, the side surface of the electrode is in contact with the third side surface of the connecting base, and the side surface of the graphite bolt is in contact with the fourth side surface of the connecting base; an area of the third side surface is substantially the same as an area of the fourth side surface; and the first side surface, the third side surface, and the fourth side surface are substantially parallel to one another.