High pressure die casting of aluminurm alloy is a kind of precision casting method which uses high pressure to force the alurninum allay into the metal mold with complex shape. Die casting is one of the most widely used casting processes.At present, Dongrun is equipped with 1 set of 1650 tons，1 set of 1250 tons, 2 sets of 800 tons,and 2 sets of 280 tons of die casting machines,which can produce a maximum of 800mm/piece and weigh about 10kg.