Abstract: Huashan rock mass, Laoniushan complex and Huayangchuan ductile shear zone play an important role in the process of mineralization in Huayangchuan area of North Qinling Mountains. They are not only a record of tectonic evolution, but also an important indicator of tectono-magmatic mineralization.In this paper, based on the systematic study of the surface and airborne gravity, magnetic survey data, and surface electrical section and other geophysical data in Huayangchuan area, statistical analysis of physical properties;merge aviation data and ground data; and proceed 2.5 dimensional interactive inversion and three dimensional inversion with prior information constraints. The regional three-dimensional geology-geophysics model of Huayangchuan area is constructed, which provides the geophysical basis for the study of regional geological background and deep geological structure. Inference and interpretation of Huashan rock mass, Laoniushan complex and Huayangchuan ductile shear zone of the three dimensional shape and spatial distribution. This paper has analyzed and discussed the deep contact relationship among huayangchuan ductile shear zone, Laoniushan rock mass and Huashan rock mass, which has certain guiding significance for deep prospecting of uranium, molybdenum and other deposits in the peripheral contact zone of the large rock mass.