The precision casting business adopts resin sand molding, cold core box core and medium frequency electric furnace smelting. It mainly consists of gray cast iron and ductile iron. It mainly develops and produces various engine parts, automobile lost molds and other high value-added casting products. With a production capacity of 30,000 tons, the maximum weight of a single piece of product can reach 50 tons. It has an annual production capacity of 1000 sets of large and medium-sized diesel engine bodies, 25,000 sets of small diesel engine bodies and 100 sets of large shell casting products.