In view of the current situation of core drill training in China， and with comprehensive analysis of the virtual reality visualization at home and abroad， a training system different from the existing one which is limited to the basic function training operation of the drill has been developed through combination of virtual reality technology， Unity3D and teaching AIDS. The platform is composed of the full size model， the programmable controller and the virtual scene. On one hand， the simulation training system software simulates the operation of the drill； on the other hand， the relevant data in the drilling process can be displayed to enable students to master drilling procedure parameters， and identification， prevention and treatment methods of complex accidents in the hole. After several virtual scene control experiments and tests， the platform can run stably， students can intuitively feel the operation of the controlled object， enhance the hands-on experience， deepen the understanding of geological core drilling， and reduce the teaching cost.