To deal with the problem of depletion of iron mine reserves in the area of Xiangshui River in Heilongjiang Province, it is needed to study the geological structure of the region. Through TEM measurements and the corresponding data processing, -350 to -600 m apparent resistivity and the corresponding relationship between different lithologies are set up in the area. According to the regional differences in apparent resistivity lithology, four fracture zones are divided. According to the apparent resistivity difference between rock and ore greater than two orders of magnitude, the spatial location of the ore is explained. With the actual verification of deep drilling, see mine rate reaches 75% so that the efficiency of mining exploration is greatly improved.