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A process mineralogy of a copper sulfide ore with high arsenic content was studied by means of electron probe(EMPA)optical microscope mineral automatic quantitative analysis system(AMICS) scanning electron microscope and energy dispersive spectroscopy ( SEM-EDS), combined with chemical analysis chemicals. Results show that the main major mineral factor that influence the effective of copper concentrate is the occurrence of As in the ore. Besides, there is a dose relationship between arsenic-bearing copper minerals ( energize and arsenfahierz), and no-arsenic copper mineral ( chalcocite, bornite and chalcopyrite), hence, it is very difficult to separate arsenic-bearing copper minerals from non-arsenic- bearing copper minerals by grinding. Such ore characteristics determine that although the particle size of copper mineral is relatively coarse, and the proportion of monomer and rich continuum has reached 88. 04% when-0. 074 mm accounts for 50%, which can ensure high copper recovery rate and copper grade, it is inevitable that arsenic in copper concentrate exceeds the standard and affects the recovery of coppers. [ABSTRACT FROM AUTHOR]