<p>Achieving green extraction of gold and copper via electrolytic refining of high-silver anode plates has emerged as a significant development trend in the global copper electrolytic refining industry. However, a high silver content in the anode plate can result in elevated Ag levels in the copper cathode, posing challenges for stable control. To address this issue, a novel method involving the insertion of acid-resistant filter membranes between the anode and cathode was proposed to purify the electrolyte in the cathode region and reduce the silver content in copper cathode. By investigating the migration behavior of silver elements in the electrolyte, the structural characteristics of anode slime and the silver content in the copper cathode, the underlying mechanism by which the filter membrane influences the silver content in the copper cathode produced through electrolytic refining was elucidated. Compared to scenarios without a filter membrane, the addition of a filter membrane promotes the aggregation of silver-containing compounds within the adhered anode slime and enhances the densification and enlargement of anode slime particles at the bottom of the tank. The particle size of suspended anode slime in both the anode and cathode regions of the electrolyte decreases; however, fine anode slime particles that traverse the filter membrane from the anode region into the cathode region undergo aggregation and growth in the cathode region. The filter membrane effectively prevents fine anode slime particles containing Ag from entering the cathode region, reducing the Ag content in the cathode region's electrolyte by 27% and 61%, respectively. The incorporation of a filter membrane significantly diminishes the silver content in the copper cathode, decreasing it from 7.75 g/ton to 4.75 g/ton, representing a reduction of 38.7%.</p>