Improving the interactivity and stereoscopic display effect of the virtual disassembly system has positive significance for the practical application of virtual simulation projects. A core drill for geological engineering is used as an object, and a set of core drill virtual disassembly system is developed using Unity3D and zSpace platforms. The system disassembly module mainly uses the six-degree-of-freedom stylus to realize interactive operations such as grasping, scaling, exploding, and resetting on the core drilling machine and other important components such as the dividing box, rotary. Through the zView plug-in package, the augmented reality display effect of the disassembly process is realized. The knowledge structure of the virtual training system is improved by adding the matching theoretical knowledge modules such as rig introduction, process flow and safety specification. The practice shows that the system has the characteristics of strong interaction and good display effect, and has achieved good results in practice teaching.