The casting process includes the steps of core shooting machine, core making, core setting, mold closing, overlapping and pouring. The model used by the core shooter to make the outer mold and core of the casting is metal mold. Because the steel mold is made by the machining center, the sand mold has high dimensional accuracy, so the casting has high dimensional accuracy. The molding sand used in the production is coated sand, the surface quality of the casting is good, and the casting is easy to clean. The casting process is suitable for steel, cast steel, cast iron and nodular iron.