The extraction and separation of ferrum and copper from waste ternary cathode material by Cyanex 302 (the main component is di (2,4,4-trimethylamyl) monothiophosphoric acid) was studied. The effects of H⁺ concentration, extractor concentration and temperature on the extraction and separation performance of Cyanex 302 were investigated. And the technological conditions for the stripping of ferrum and copper in supported organic phase were determined. The process flow of extracting ferrum and copper from waste ternary cathode material leaching solution is designed. The results show that the optimal extraction conditions are 0.1 mol/L Cyanex 302 concentration, 0.1 mol/L H⁺ concentration, room temperature.Under these conditions, the extraction rates of ferrum and copper are over 99.9%, while the extraction rates of Ni(Ⅱ), Co(Ⅱ), Mn(Ⅱ), and Li(Ⅱ) are all below 0.003%. The optimal stripping agent for ferrum is 1 mol/L H₂SO₄, and that for copper is 1.5 mol/L HNO₃.The process can effectively separate copper and ferrum from the leaching solution.