Choosing the current of the front inductor of SEPIC converter as controlled object, the resonant parametric perturbation is applied to control the chaos in SEPIC converter. Through the small perturbations of circuit parameter, chaos control of SEPIC converter is realized, and the results are analyzed by the time domain waveform, power spectrum, and bifurcation diagram. Finally, the results of the circuit experiment demonstrate that chaos control of SEPIC converter can be realized by the resonant parametric perturbation method.