The utility model relates to a reverse experience device of step voltage, the device include the simulated line, and it is equipped with the wire including the simulation shaft tower on the simulation shaft tower, simulation ground, the wire forms the short circuit with simulation ground contact to the contact point is the center and forms a plurality of equipotential lines, is equipped with a plurality of simulation footprints on every equipotential line, simulates the footprint and has a proximity switch, and the proximity switch on every equipotential line all is connected with a relay, and the control cabinet, it includes PLC control module, warning light and audio alert ware, PLC control module is connected with warning light and audio alert ware respectively, and PLC control module still is connected with all relays. The utility model discloses a simulation power line ground connection short -circuit fault uses the wire to fall to the ground a little to form the equipotential circle as the center in that the simulation is subaerial, and the student walks on the simulation footprint, through proximity switch respond to and acousto -optic warning reflect its method of fleeing from correctly whether to it flees from technical ability to make the student master the exact.