The invention discloses a method for short-process horizontal continuous casting of a nodular cast iron profile. The method that after blast furnace molten iron just discharged from a furnace is subject to modification, purification, breeding and spheroidizing treatment, nodular cast iron is produced by direct horizontal continuous casting is adopted, so that the process that the ductile cast ironprofile needs to be re-smelted to obtain molten iron by adopting a conventional horizontal continuous casting process is removed, the energy consumed by re-melting of bread iron is greatly saved, theenergy consumed by horizontal continuous casting production of spheroidal graphite cast iron is greatly reduced, the production cost of the horizontal continuous cast nodular cast iron is greatly reduced, and a powerful guarantee is provided for the energy-saving, consumption-reducing and green environment-friendly casting of the nodular cast iron horizontal continuous casting production.