Abstract: Precious and rare metal minerals in our country are rare, especially the strategic key minerals, there are few good ore, low grade, low degree of detection, limited sample testing methods. A summary of the exploration methods used for the Pb-Zn and Rb rare metal deposits found in the Zhengxiangbai Banner Area of Inner Mongolia in recent years can provide a geological basis for further exploration. The comprehensive investigation in Sanmianjing Mining Area in Inner Mongolia shows that there are good metallogenic conditions in the area. Several alteration and fracture zones have been delineated in the early construction area, and the boundaries of some alteration zones are not strict, the local surface alteration zone is inferred from the alteration in the borehole, especially the spatial distribution and deep extension of the ore body in the periphery of Ore Section I are not clear. In order to analyze the spatial distribution of the ore bodies in the periphery of Ore Section I, based on the systematic collection and analysis of the previous geological, mineral and geophysical and geochemical data in the study area, two methods are combined to carry out surface exploration, the aim is to determine the plane position of the alteration zone and the mineralized body, and to find out the buried depth, occurrence and extension of the deep polarized body. The comprehensive analysis shows that the combination of IP middle ladder and IP sounding is an effective geophysics prospecting method, which has a very important guiding significance for further geological prospecting in this area.