Abstract: To explore the process mineralogy of a gold ore,MLA and chemical analysis measures are taken to carry out systematic study on the process mineralogy of the ore.The results show that gold is the only valuable element in the ore and its grade is 2.30 g/t;the main metal minerals are limonite and hematite,and the process mineralogy type is breccia type microfine gold oxide ore; the gold mineral is dominated by native gold,the dissemination grain size is dominated by micro and fine particles which account for 86.08 % and the dissemination status is intergranular gold; the few gold telluride minerals in the ore have certain effect on gold leaching rate.