3ds max was used to create the three-dimension modeling, to provide the operation object for virtual maintenance; OrCAD was used to circuit simulation model, to provide the data support; The virtual maintenance operation was designed in the virtual environment, which was created by EON Studio. The result of circuit simulation was sent to virtual environment via VB, complicating real-time reading the simulating result of the electron equipment, providing cogent technology for maintenance training of the electron equipment.