Abstract: With the significant improvement of computer processing power and GIS technology, 3D geological modeling has been increasingly applied in mineral exploration. Geological and mineral exploration is essentially a 3D spatial operation, involving the collection and analysis of 3D spatial data. Three-dimensional modeling is a process that utilizes methods such as drilling and tunneling to acquire deep geological information, thereby visualizing the grade, reserve scale, spatial location and morphological characteristics of underground ore bodies. As a professional 3D modeling software, 3DMine can efficiently integrate exploration data and possesses the capability to transform various data information into interactive graphics, effectively addressing challenges of 3D spatial analysis and expression. In recent years, the gradual depletion of shallow gold resources in the Xiaoqinling region has made deep prospecting an inevitable trend in local geological exploration work. In order to improve the accuracy of deep prospecting prediction, this study explores the application of 3DMine software. This paper focuses the Xiangmagou gold deposit in the Xiaoqinling gold field. The 3DMine mining engineering software is used to sort out the tunnel sample data of the mining area and establish a geological database. Furthermore, 3D geological models of the surface, strata, ore bodies and blocks was constructed, enabling resource estimation and comparison analysis. Through detailed analysis of the Xiangmagou Gold Deposit and the collection of specialized research samples, the metallogenic patterns and prospecting indicators were summarized. Based on these findings, the tectonic superimposed halo method was employed, integrated with the 3D geological models, to predict deep-seated mineralization. This approach delineated three favorable prospecting target areas and expanded the potential deep-level resources.