Located in the southern part of the Baoshan-Zhenkang metallogenic belt, the Zhenkangluziyuan lead-zinc and iron ore deposit of Yunnan possesses a complex geological structure, well-developed multi-stage tectonic magmatic activity, and an excellent metallogenic conditions. Years of comprehensive study and gravity, aeromagnetic and geological exploitation indicate that there exists a concealed rock body in the Luziyuan area. To identify the distribution, undulating shape and depth of the concealed rock body, the authors used the magnetotelluric method (AMT) and three-dimensional gravity inversion method. The distribution and undulating shape of the concealed rock body can be detected by the three-dimensional gravity inversion. The AMT dimensional inversion reflects the deep geological structure and the undulating shape and depth of the concealed rock body. Combined with geological data as well as a comprehensive study of the relationship between the concealed rock body and the lead and zinc iron mineralization at surface and in near-surface place, the authors point out the deep prospecting direction, which provides further guidance for deep prospecting in the exploration area.