Based on analyzing the character of 3D CAD MineStar software，applying AotoCAD software as well as aided design software for 3D mine，according to actual situation of the mine，entity model with 3D digital mock-up for geology and mine system at the Dayin’gezhuang gold mine was established，which had improved the information，production intelligent and automation level，production intelligence information and automation level.Moreover，it is meaningful and can provide significant direction for improving the speed and precision of the prospecting，mining quantity computation，aided design and safety management.