Abstract: The paper introduced the concept of digital mine and its development target,analyzed current situation of digital mine in China,proposed a construction frame of digital mine taking digital mine basic information platform based on 3DGIS technology as core.It briefly introduced the key technologies for realizing digital mine such as information regulation and interface standards,intellectualization of equipments,high-speed transmission network,integration and sharing of multi-source heterogeneous data,platform of 3DGIS,3D modeling algorithm,analysis and processing of specialization for basic data,development of business application systems and so on.It has guiding significance for development of digital mine in China.