The invention discloses a multi-core reducing multi-
ladle co-
casting method and device for composite
casting large composite steel ingots. The multi-core reducing multi-
ladle co-
casting method comprises the steps of selecting core blanks, regulating the temperatures of the core blanks, re-removing scales on the surfaces of the core blanks, assembling the core blanks and
ingot molds, reducing
oxide scales on the surfaces of the core blanks, casting and
compositing and cooling composite ingots. The device adopted by the method comprises a tank body, a reducing gas inlet, a heat preservation layer, bolts, a bin door, risers, heat insulation plates, the steel
ingot molds, the core blanks, shims, a trolley, an
inert gas inlet, a bottom heat
insulation layer, an exhaust port, an explosion-proof end cap, a vacuum
exhaust valve, a
vacuum pump, circulating fans, riser bricks, casting channels, sealing valve rods, sealing valve bodies, sealing valve plates, sealing
asbestos, sliding nozzles and steel ladles. Large and ultra-large molded steel ingots which cannot be produced by means of an orthodox casting method can be manufactured. The steel ingots manufactured by means of the multi-core reducing multi-
ladle co-casting method and device has the advantages of being low in production cost, high in solidification speed, small in internal segregation, even in components and high in finished product rate.