The invention relates to a Unicom training device for dispatching training and relay protection training in power training, belonging to the technical field of power system training. The device comprises a communication card and a signal distributor, wherein the communication card is used for receiving an analogue result of a large power grid system through parallel buses, sending the analogue result to the signal distributor, meanwhile, receiving an analogue result of a relay protection system from the signal distributor, and sending the analogue result to a computer through parallel buses; the signal distributor is used for sending the received simulation analogue result of the large power grid system to a relay protection training system, meanwhile, sending the simulation analogue result of the relay protection training system to the communication card; and the communication card and the signal distributor are connected through an optical fibre. According to the Unicom training device disclosed by the invention, the simulation analogue switch information obtained by the relay protection device is transferred to a dispatching training system; the dispatching training system is used for adjusting the structure of a large power grid by utilizing the switch information; a more real training effect is achieved; and the qualities and the skills of power grid workers can be increased.