Abstract: Underground laneway is most important component in coal mining and it’s very difficult for visualization because laneway has complex relation in each other.According to characters and applications of mine，this paper researches on 3D data model and takes the laneway made up of the node，joint and mid laneway line.By building up the topologic relation，adding section and joint processing，3D laneway model can be built well.Addition to that，making use of database and virtual reality technology，it can be convenient to realize data storage，3D visualization and operation in 3D circumstance about laneway.At last，this paper makes a prototype system with underground laneway data from a mine in Shanxi province.