The invention relates to a die casting method for an automobile accessory. The die casting method adopts an aluminum alloy and comprises the following steps of A, metamorphic treatment, specifically,raw materials are melted and heated up to 800-900 DEG C% for the metamorphism treatment, and still standing is conducted for 2-4 hours; B, smelting, specifically, the raw materials after metamorphic treatment is heated up to 700-800 DEG C and turned into a liquid material; C, die closing, specifically, until there is a 20-30 mm gap in the die molded surface, die closing is stopped; D oxygen injecting into the gap; E, die closing continuing to make the die completely close; F, liquid raw material injecting into a barrel, G, oxygen injecting into the barrel after injecting the liquid material into the barrel, H, die casting, I, cooling, and j, die opening, that is, die-casting of a product is completed. The die casting method has the advantages that the strength and hardness of the automobile accessory made by the aluminum alloy are suitable for production requirements of the automobile accessory, the ductility is good, and the punching demand can be met; and meanwhile, the automobile accessory is super durable and corrosion-resistant, thus the service life of the automobile accessory is improved.