The invention discloses a power electronic converter robustness switching control method. The method comprises the steps of 1, building a system model, wherein in order to enable a system to change areference point into an original point during control, a PWA model type of a Boost converter is changed into an error model type of the Boost converter; 2, obtaining a controller parameter, and obtaining a matrix in a robustness switching controller; 3, according to a switching law, controlling a circuit of the Boost converter, that is, when an output voltage is larger than a desired voltage, adaptively reducing the reference value of an inductive current, when the output voltage is smaller than the desired voltage, adaptively increasing the reference value of the inductive current, outputtinga high level through a switching controller to switch on a switch S, and otherwise, outputting a low level through the switching controller to switch off the switch S. By means of the control method,the dynamic response time of the system is shortened, and the robustness of the converter to the input voltage and load sudden change is enhanced during running.