The invention discloses a multi-parameter superposition simulation-based electronic transformer performance test system. The system comprises an intelligent substation electric field environment intelligent simulation system, an intelligent substation magnetic field environment intelligent simulation system, an electronic transformer electrical parameter simulation system, a multi-parameter crosssuperposition control and monitoring system and a test platform. The intelligent substation electric field environment intelligent simulation system is used for simulating the existing electric fieldenvironment of a transformer substation. The intelligent substation magnetic field environment simulation system is used for simulating the existing magnetic field environment of the transformer substation. The electronic transformer electrical parameter simulation system is used for simulating the voltage and current conditions of electronic transformers with the voltage thereof to be 220kV and below. The multi-parameter cross superposition control and monitoring system is used for sending control signals to a booster and a riser, so that the superposition of the electric field intensity andthe magnetic field intensity in the environment of an electronic transformer is realized. The simulation of the actual environment of the intelligent transformer substation is completed. According tothe invention, the research on the influence mechanism of various complex factors in the field operation environment of the electronic transformer is achieved.