Abstract: In order to efficiently recover the valuable metals of copper and cobalt in a high-cobalt copper oxide ore from Congo（DRC），aiming at the problems of low recovery of copper and cobalt and high acid consumption in the treatment of high-cobalt copper-cobalt oxide ore by direct reduction acid leaching process，a step-by-step sulfuric acid leaching test of sulfuric acid leaching copper first and then reduction leaching cobalt is carried out. The effects of grinding fineness，liquid-solid ratio，sulfuric acid dosage， leaching time and reducing agent dosage on the leaching effect of copper and cobalt are systematically stud⁃ ied.The results show that under the conditions of grinding fineness of -0.074 mm72%，liquid-solid ratio of 4∶1，leaching time of 4 h，sulfuric acid dosage of 126.22 kg/t，sodium metabisulfite dosage of 60 kg/t， the copper-cobalt raw ore of copper content of 3.93%，cobalt content of 1.88%，copper oxidation rate of 93.38% adopts step-by-step acid leaching process，and 96.87% copper leaching rate and 96.17% cobalt leaching rate are obtained. The net acid consumption of the ore is 1 399.33 kg/t. The obtained copper and cobalt leaching rate is high，the acid consumption is low，and the comprehensive recovery effect of the tar⁃ get mineral is good.