The invention relates to a substation training device based on a PLC (programmable logic controller). The substation training device comprises a base, an operating display screen, an alternating current air switch, an alternating current contactor, an intermediate relay, the PLC, a grounding fault setting device, a wiring terminal block, PLC signal input devices and PLC signal output devices, wherein the base is provided with a power plug, and the operating display screen comprises a box shell, a simulation circuit board, a warning device, an isolation switch operating rocking rod, a displayer I, a displayer II and a plurality of voltmeters. The substation training device has the advantages that through controlling the operating display screen by the PLC, one-time analogue simulation training of a substation is realized, the training problem of electricity utilization operating personnel is solved, the educational and training quality of trainees is fast promoted, the acceptability of electricians for network access operation is greatly improved, the operation is visual and vivid, the trainees can easily grasp the learned key points, a notable effect is produced, and the problem that the actual operation is very complex and is difficult to grasp is solved.