The invention relates to a load simulation and detection device of a static reactive power compensation testing platform, and belongs to the technical field of power transmission and distribution. The device comprises a detection and control part and a simulated load part; the simulated load part comprises an impedance fixed main load, an additional load and a relay; the additional load comprisesa resistive load, a capacitive load, an inductive load and a conducting wire; the additional load is connected in parallel with the impedance fixed main load through the relay; a circuit connection comprises that a DSP chip of the detection and control part is connected with an electric network through a mutual inductor set; the relay of the simulated load part is connected with the DSP chip of the detection and control part; and the impedance fixed main load of the simulated load part is connected with the electric network. The device has the advantages that the simulation of various loads can be achieved by programming, the structure of the loads is simple, and the loads are convenient to control. The A/D conversion of the system is started by a voltage zero-crossing signal after frequency multiplication of a locking phase, the synchronous sampling can be ensured, and the precision of parameter calculation is improved.