Abstract: Hydrogen as a clean energy source, plays a crucial role in building a clean and low-carbon energy system. Although alkaline water electrolysis technology has been widely applied in China, the issue of its high energy consumption needs to be addressed urgently. To enhance the decomposition efficiency of water, there is an urgent need to develop low-cost and highly efficient electrocatalysts to promote the hydrogen evolution reaction. Constant current electrodeposition was used to prepare a Fe-Co-Ni ternary alloy electrode on a brass substrate, the impact of process parameters on the hydrogen evolution performance of the coating were investigated through linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Tafel plots and X-ray fluorescence spectroscopy (XRF). The experiments show that different process parameters have a significant impact on the hydrogen evolution performance of the Fe-Co-Ni alloy electrode. The hydrogen evolution performance increases with the rise of deposition temperature and decreases with the increase of total ion concentration of Fe²⁺, Co²⁺, Ni²⁺ in electrolyte. At a deposition temperature of 45 ℃ and a total metal ion concentration of 0.054 mol/L, the overpotential for hydrogen evolution is only 0.212 V, and the Tafel slope is 110 mV·dec^-1, demonstrating better catalytic activity of hydrogen evolution.