The regulation of the output power of inductively coupled power transfer (ICPT) systems has been a hot topic. In this paper, an output power adjustment method based on dynamic decoupling is proposed. Two full-control switching tubes are added to the secondary side rectifier circuit of the wireless energy transmission system, and the duty ratio of the two switching tubes is adjusted to achieve the control output. The purpose of the power size. By comparing the working principle and characteristics of four common power adjustment methods, such as frequency modulation, amplitude modulation, phase shift and energy injection, the method has incomparable advantages in terms of speed, stability, complexity, volume and cost. Finally, the correctness of the theoretical analysis is verified by experiments.