Abstract: BIM (Building Information Modeling) technology is a data-based tool applied to engineering design, construction and management. Through the integration of data and information model, it is shared and transmitted during the whole life cycle of project planning, operation and maintenance, which provides a platform for the project participants to work together and has been widely recognized by the industry on a global scale. At present, the application of BIM technology in China's open pit mines is in its infancy. The open pit mine project has the characteristics of complex geological conditions, many production links, dynamic development of project, multi-source distribution of information, and large volume of data. The design, construction, production and operation of the mine are in progress. The loss less transfer, sharing and linkage of all the information in it has not been fully realized. In order to solve this problem, the whole engineering field, and the different needs of the full participants, the dimensions of the information model are clarified, and the overall idea of the platform construction is proposed based on the full life cycle of the open pit mine project, and the four-layer function of the BIM collaborative work platform for the open pit mine project is constructed, including the application layer, platform layer, technology layer and software layer, and combining the characteristics of integrated open-pit mining professional software and BIM general software. The 10 key technologies of real three-dimensional refined information model construction, open-pit mine three-dimensional optimization design and virtual mining, model geo-science information and engineering attribute transfer sharing, equipment model parameterization and engineering parameter design are proposed. The research results show that the deep integration of open-pit mining professional software and BIM general software can give full play to the advantages of both, and establish a collaborative work platform integrating the three-dimensional geological, mining, ground production system, industrial site and other engineering elements and refined information model, and form a unified BIM model digital delivery standard for open pit mine projects, which lays a theoretical foundation for further research and development of a "high-quality" three-dimensional foundation platform for intelligent open pit mines.