Abstract: It is the inevitable trend for the development of mining to innovate traditional mining industry by using modern high technologies.Virtual mine is an important part of digital mine，and is a new type of expression for the traditional mining，so it plays a vital role in mine information construction.Based on the analysis of the research and application of digital mine at home and abroad，the structure of three-dimensional dynamic deduction system for underground mining engineering in metal mine was discussed，and how to accurately show the natural entity，artificial entity and three-dimensional geological data and visually demonstrate the spatial relationship among the industrial square，formation，roadway and working face in mining area were expounded with the aid of render 3D graphics rendering technique and the geographic information system technology.On these basis，through the effective integration and analysis of underground metal mine engineering data，the mining method was optimized.Also，combining with the mining design standards and the design concept of mining design engineer，the dynamic deduction for exploitation process was realized，thus providing an important scientific basis for decision-making by the designer.

Key words: Metal Mine, 3D visualization, Dynamic deduction, Digital mine