Abstract: Catalytic oxidation technology is used to treat antimony electrodeposition lean liquid generated by wet antimony refining,and produce sodium antimonate products by the new technology and new process of catalytic oxidation for the conversion of sodium thioantimonate in the lean liquid.Experimental studies and industrial applications have shown that catalytic oxidation technology effectively recovers antimony from the lean liquid,achieves the effective utilization of mineral resources,greatly improves various technical indicators,and increases enterprise operating output.