Abstract: Thiosulfate gold extraction technology has gained considerable interest owing to its environmental compatibility and broad applicability to diverse ore types. However, the lack of efficient methods to recover \mathrmAu(\mathrmS_2\mathrmO_3)_2^3- from leaching solutions has hindered its industrial implementation. To address this challenge, this study used a thiosulfate leaching solution from quartz-type gold ores to design an activated carbon-coated titanium electrode (Ti@AC) with a porous surface structure. This electrode facilitated the direct reduction of low-concentration \mathrmAu(\mathrmS_2\mathrmO_3)_2^3- to metallic gold (Au⁰) in solution, achieving a gold recovery of 99.58%, surpassing other recovery methods from the leaching solution by 30%‒80%. After ten consecutive 200 L pilot-scale tests, the Ti@AC electrode demonstrated remarkable stability, consistently maintaining a recovery >98% and yielding 20.23 g of gold. The porous architecture of the activated carbon (AC) promoted the adsorption of low-concentration \mathrmAu(\mathrmS_2\mathrmO_3)_2^3- , while its low charge transfer resistance facilitated the efficient conversion of \mathrmAu(\mathrmS_2\mathrmO_3)_2^3- to Au⁰. Moreover, the reduction reaction generated a concentration gradient near the cathode, promoting the diffusion of \mathrmAu(\mathrmS_2\mathrmO_3)_2^3- toward the electrode and ensuring an efficient recovery process. This study provides a feasible strategy for the direct reduction of low-concentration precious metal ions to monomers with high recovery and low costs, which is promising for industrial applications.