Based on 3D modeling theory,3D visualization of underground mines is an important part of mine digital construction and an inevitable trend of mine development in the future.In the case study of Jinshan Gold Mine,Dimine software is used to establish the geological database and related three-dimensional model.The geological basic database,terrain model,roadway model,ore body model and reserve model are introduced in detail.Based on 3D visualization model,the ground terrain,spatial morphology of ore body,and its spatial relation in mines can be displayed in a more explicit way,which is significant to safe production in mines,reasonable development and utilization of mine resources,and long-term mine development.