The　flotation　separation　of　enargite　from　copper　sulfide　minerals　is　difficult　owing　to　the　similar　floatability　and　reagent　adsorption　characteristics　of　these　minerals.　In　this　study,　the　effect　of　oxidation　treatment　using　NaClO　flow　with　FeCl3　on　the　flotation　separation　of　covellite　and　enargite　was　systematically　investigated.　Micro-flotation　tests　and　contact　angle　measurements　indicated　that　the　addition　of　NaClO　and　FeCl3　increased　the　hydrophobicity　difference　between　covellite　and　enargite.　The　bench-scale　flotation　test　results　show　that　the　bulk　copper　concentrate　could　be　separated　into　two　products:　a　low-arsenic-containing　(0.46%)　and　a　high-arsenic-containing　(5.18%)　copper　concentrate.　X-ray　photoelectron　spectroscopy　and　scanning　electron　microscopy　revealed　that　the　oxidization　treatment　of　NaClO　caused　the　accumulation　of　oxides　on　the　covellite　surface,　but　not　on　the　enargite　surface.　The　varying　precipitation　of　ferric　hydroxide　on　the　surfaces　of　covellite　and　enargite　further　exacerbated　the　difference　in　the　hydrophilicity　of　these　minerals.　Thus,　a　possible　method　for　separating　enargite　from　covellite　was　obtained　through　oxidation　treatment　using　NaClO　and　FeCl3.