Abstract: EH4 geophysical system belongs to electromagnetic survey method.EH4 system is the most effective electromagnetic method for metalliferous mineral explorations with high detecting resolution and appropriate depths of penetration.It is frequently effective to investigate the spatial variations,sizes of ore bodies in mineralized/alteration zones.The method was used to a lead-zinc mineral which occurrences in the southern segment of the Daxing'an Mountains,and the surveying results of EH4 system measurement show that there is a clear geophysical anomaly in depth of periphery of the deposit.It is indicated that the periphery of deposit has a good metallogenic prospects.The surveying results also indicated that EH4 system was applied in combination in a case study at known deposit in order to find out an extension of ore bodies,which finally turned out an ideal and expected results.