The utility model relates to a 500 kV alternating-current and direct-current substation quaternary fission 'C'-shaped equipment clamp hardware tool which consists of a clamp body and a drainage tube, wherein the clamp body adopts a 'C'-shaped structure, four outgoing wiring terminals are arranged in four directions of a bottom plate in the clamp body, the cross-sectional area of each wiring terminal is consistent with that of a drainage wire, a reinforcing rib is arranged between two adjacent wiring terminals, and the drainage tube is welded on the clamp body. The equipment clamp hardware tool has the following advantages: 1. not only effectively avoiding visible corona generated when large current flows through, but also maintaining good current-carrying performance; 2. adopting special ZL102 aluminum alloy as a raw material and adding trace elements such as strontium, silicon, manganese, magnesium and rare earth to be molten in certain high temperature conditions, and conducting treatment such as polishing, shot blasting and chemical passivation to achieve high strength, high toughness, corrosion resistance and high temperature resistance of products; 3. having remarkable energy saving effect which is improved by 10-20%; and 4. being novel, unique and simple in structure design, convenient in installation, and applicable to 500 kV alternating-current and direct-current substations.