This virtual simulation system combines mixed reality (MR) technology with mold disassembly and assembly, and presents the mold disassembly and assembly training room as a virtual scene and mixed reality based on MR technology, including relevant virtual molds (typical injection molds, including typical two plate molds and typical three plate molds; typical cold punching dies, including guide pillar fixed unloading blanking die, guide pillar guided elastic unloading punching die, composite die, etc.; all molds are equipped with 3D data and two-dimensional assembly drawings at the same time). This system can use MR glasses to realize the whole process simulation of mold mechanism movement, and have observation functions such as mold perspective and rotation, and interactive demonstration of mold disassembly and assembly. It is mainly used for the teaching of mold disassembly and assembly technology and related post training in various colleges and enterprises, so as to achieve the purpose of reducing costs and risks, and solve the practical problems such as the lack of equipment and aging in the mold disassembly and assembly training room.