Abstract: Roasting -acid leaching -cyanided process is adopted to treat the complex silver concentrate. The result shows that the cyanide leaching rate of gold and silver are 72.01 % and 18.41 % respectively, with the silver content of 355 g/t in residue, under the condition that roasting temperature is 923 K with roasting time of 2 h, sulfuric acid leaching liquid -solid ratio of 1.5 ∶1, reaction pH value of 0.8 ~1.0, acid leaching temperature of 368 K with reaction time of 1.5 h, cyanided liquid-solid ratio of 2 ∶1with reaction pH value of 10~11, sodium cyanide concentration of 1.5 ‰ with reaction time of 48 h. Under the same conditions, when complex silver concentrate blended with other mineral secondary ore according to certain proportion, the cyanide leaching rate of gold and silver raises by 24.89 % and 15.66 % respectively. The silver content reduces by 223.35 g/t in residue.