Abstract: In this paper,the chemical composition and mineral composition of a gold ore sample,dissemination characteristics and dissociation degree of a gold ore are studied by means of BPMA process mineralogy parameter automatic analysis system,and the mineralogical factors affecting gold recovery are systematically analyzed.The results show that metal minerals in the ore are mainly pyrite,chalcopyrite,galena,sphalerite and so on; the gangue minerals are mainly quartz,sericite,feldspar and so on；gold in ores mainly exists in the form of native gold and electrum,most of them are coarse-grained gold and gold mainly occurs as elemental gold.The research results have guiding significance for the formulation of ore separation process.