Abstract: Taking Xiadian Gold Mine as an example， this study utilizes 3 DMine， a 3 D mining software， to establish a drilling database. By using exploration line cross-sections and delineating the outlines of ore bodies， a three-dimensional ore body model is constructed to estimate mineral resources and analyze the occurrence of ore bodies at depth. The 3 D mining software enables visualization of mineral resources and provides guidance for mining production， as well as serving as a basis for model data for subsequent exploration work in the mine.