Abstract: Main copper minerals in a foreign copper oxide are pseudo-malachite，chalcosiderite and hentschelite，with Cu grade of 2.07%，oxidation rate of 82.86%，binding rate of 51.91%. Hydro-pretreatment with K1- sulfuric acid leaching process was conducted to high effectively recovery copper from the ore. The results showed that，grinding fineness of pretreated stage is 60% -74 μm，with pulp density of 35%，K1 concentration of 9% at 85 ℃ for 1 h，pulp concentration of sulfuric acid was 25%，sulfuric acid concentration of 13.8% at 50 ℃ for 3 h，the corresponding copper leaching rate is 87.44%.

Key words: Conjunction oxidized copper, Hydro-pretreatment, Acid leaching