The invention relates to a switching time self-correcting power electronic system simulation method, and belongs to the technical field of electromagnetic transient analysis of an electric power system. The method comprises: firstly, using a two-stage integration method to derive an element level Norton equivalent model, and then through a node voltage method to perform electromagnetic transient calculation; a switching model using an ADC model, that is, an inductance capacitance model; when a system detects on-off operation and breaker operation, using an interpolation algorithm of the two-stage integration method to solve, and through one interpolation and regulation of [mu] and h values, an interpolation process is completed. Since network solution uses the higher-order algorithm provided in the invention, the method can improve simulation precision, and since the interpolation method is simple and efficient in calculation, implementation of offline simulation and real-time simulation is easy, and the method is suitable for engineering popularization.