Abstract: A 3D virtual mine simulation system platform based on NeoAixs engine is designed and implemented, which focused on the architecture, functional structure and workflow of the platform. The platform has the functions of resource editing management, 3D simulation scene design, mine simulation system design, mine safety training system design, etc. Practical application shows that the platform can quickly construct three-dimensional simulation mine of coal mine, and embeds the functions of accident simulation, training and evaluation in simulation environment. It can be used in three-dimensional digital mine, simulation training, accident simulation, rescue drill and other fields.