Abstract: Process mineralogy is conducted on a marmatite ore from Dulong by chemical multi-element analysis, microscopic observation, energy spectrum analysis of mono-mineral chemical components, MLA automated quantitative surveying technique to provide guidelines for marmatite extraction from the ore.The main results are obtained as follows:although the raw ore contains many metallic minerals, the main target minerals are sphalerite accounting for 7.715% and a small amount of hemimorphite; the results of energy spectrum analysis of sphalerite chemical components show that the sphalerite ore contains 12.04% iron and hence belongs to the marmatite; sphalerite has a close symbiosis relationship with pyrrhotite and chalcopyrite; almost 50% of -0.2 mm sphalerite exists as the intergrowth particles, which contains approximate 7% magnetite and 10% pyrrhotite.According to the above conclusion, it is recommended that the low intensity magnetic separation is first used to enrich magnetite and pyrrhotite; the flowsheet of floating copper and inhibiting zinc is adopted to recover copper-bearing minerals; and a highly effective activator is used to activate zinc-bearing minerals for flotation.