The invention discloses a power communication network semi-physical simulation method and system. The method comprises the steps that a real device is mapped to a virtual node; the real device sends real business data to a data processing unit; the data processing unit packages real data and loads the real data to the virtual node; the data is transmitted through a virtual network, and a specificsimulation function is finished; and simulation data is extracted from the virtual node and is transmitted back to the real device. The system comprises a mapping unit, an obtaining unit, the data processing unit, a simulation unit and a transmission back unit. The mapping unit is used for mapping the real device to the virtual node. The obtaining unit is used for sending the real business data ofthe real device to the data processing unit. The data processing unit is used for packaging the real business data and loading the real business data to the virtual node of the simulation unit. The simulation unit is used for finishing the specific simulation function. The transmission back unit is used for transmitting the simulation data to the real device.