Abstract: 3D visualization technology and virtual reality simulation technology are important parts of digital mine and they are new understanding，expression as well as digitization of real whole mine and related phenomenon.Based on the 3DMine and VRP BUILDER，the virtual reality simulation system of northwest in Daxin Manganese Mine was developed，furthermore，the terrain model，tunnel model and matching model were established.The transitional docking of 3D mine and 3DS MAX was realized by considering the compatibility between the program file formats，and texture baking was done by using the Complete Map baking mode.Through using VRP-for-MAX card，the baking model was exported so as to be transferred and used by VRP editor.Some key techniques for 3D Mine model converted into VRP BUILDER scene were solved，the organic combination of mining engineering software and virtual reality software was realized，and the virtual mine system of high simulation effect was developed.The system consists of surface and underground scenarios，which has rich UI interface and interaction function.A variety of roam manners were set up in the system，in order to provide convenience for the users to understand and master the production state of overall mine quickly.Research results have great significance for improving the design quality，production and management efficiency in mine.

Key words: Manganese mine, Virtual reality, 3DMine, VRP BUILDER