The ore bodies in Bafenchang silver polymetallic deposit mainly occur in the strata of Yaosangnan Formation,and their ore-hosting surrounding rocks are mainly metamorphic sandstone,sand slate,structural breccia.In the mining district,30 industrial silver ore bodies are delineated,and 20 of them are deep concealed ore bodies,all taking the form of veins and occurring in the NNE trending structural fractured zone.The ore bodies are located at the intersection of NE and NW trending fractures.In the ore bodies,plenty of quartz veins and small amount of diorite veins intrude,indicating that the mineralization may have been through multiphase hydrothermal activities.Centered from the ore bodies,the altered rock can be pided to 3 belts:strong pyrite beresitization belt-weak silicification carbonatization belt-propilitization belt.The strata in Yaosangnan Formation,the NNE trending fracture and strong silicification are important geological prospecting indicators;positive magnetic anomaly,medium-low electric resistivity,high polarization rate are important geophysical prospecting indicators;Ag,Pb,Zn elements soil anomalies are important geochemical prospecting indicators.