The invention discloses a method for manufacturing high-tenacity automobile hardware. The method is characterized by including the following steps of S01, casting a mould, S02, manufacturing a blank, S03, conducting machining and forming, S04, conducting galvanizing, S05, conducting chromate passivating, S06, conducting nickel plating, S07, conducting nitriding, wherein the hardware generated after nickel plating is conducted is placed into a part heat treatment furnace to be subjected to nitriding processing, the nitriding temperature ranges from 700 DEG C to 800 DEG C, the nitriding time ranges from 20 hours to 40 hours, ammonia gas serves as a nitriding agent, diffusion is conducted for 3 hours to 4 hours after nitriding is completed, and a product is sent to quenching liquid after diffusion is completed, S08, conducting cleaning and polishing, wherein parts generated after quenching treatment is conducted are cleaned and dried, and deburring is conducted after polishing is conducted and S09 conducting inspecting. According to the method for manufacturing the high-tenacity automobile hardware, the hardware is good in machinable property, good in tenacity and suitable for being widely applied and popularized.