Abstract: The mineral composition of composite sulfide-oxide copper-cobalt ore and the occurrence state of copper and cobalt elements were investigated by the international advanced automatic quantitative mineral technology MLA combining with the traditional processing mineralogy.The magnetic analysis on the minerals is made，which provides the guide for the mineral processing.The research results indicated that ① The ore has a complex mineral composition，copper minerals are mainly chrysocolla，followed by chalcopyrite，chalcocite，malachite，as well as small amount or trace of tagilite，cuprite，bornite，brochantite，etc.，cobalt minerals are mainly copper and cobalt psilomelane；② Each mineral has complex symbiotic relationship with each other，and is widespread disseminated，which leads to lots of copper and small amounts of cobalt existing in gangue minerals of gold mica，pyrophyllite，chlorite，kaolinite and others；③ Major copper and cobalt minerals varies in size dissemination，chalcopyrite/chalcocite and copper cobalt psilomelane belong to the fine，micro-fine disseminated type;Chrysocolla/malachite belong to the crude-fine uneven disseminated type，and the tagilite belong to the coarse veins disseminated type；④ cobalt psilomelane，malachite，tagilite，limonite，most of chrysocolla and some gangue minerals own weak magnetic properties in different degree.Based on the findings above，it is recommended that the beneficiation adopts the following technical route with stage grinding and stage concentration: the copper-cobalt psilomelane，malachite，tagilite，chrysocolla，limonite and magnetic gangues are pre-enriched by high intensity magnetic separation.Then，copper and cobalt are extracted from high intensity magnetic concentrate by the hydrometallurgical mill，and some easy-floating minerals such as chalcopyrite，chalcocite，cuprite are concentrated from the high intensity magnetic tailings.

Key words: Composite sulfide-oxide copper-cobalt ore, Process mineralogy, Occurrence of copper and cobalt, Mineral magnetic property