The invention discloses a load shedding execution station simulation method, device and system. A load shedding execution station simulation model is established by acquiring active power, reactive power and a load round setting value of each load in a load shedding execution station in a preset operation mode from a power simulation database, and test simulation is carried out through the load shedding execution station simulation model, so that compared with a traditional method for carrying out wiring simulation through an actual load shedding execution station stability control device, complicated wiring is not needed, and the scale of a test device is greatly reduced; and furthermore, the simulation model is established, so that a plurality of load shedding execution station simulation models can be established at the same time to simulate the actual situation that the load shedding execution stations are controlled by one load shedding control station, and thus the efficiency oftest simulation and the reliability of the test are improved, and the technical problems that the wiring is complicated, the scale is large, the efficiency of test simulation is low and the reliability is low when the load execution station is tested at present are solved.