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The drive circuit plays a key role in exerting the characteristics of power devices. For devices of different materials and processes, the output voltage amplitude of the drive circuit is very different. Aiming at the power supply problem of the driving circuit of various types of devices, this article focuses on studying a power supply type that can meet the different power supply standards of the driving circuit. First, the load characteristics of the driving power supply are analyzed, and the gate voltage and driving power of different devices are compared. Secondly, the design method of flyback circuit is introduced in detail, including the selection of magnetic core and the design of inductance. Finally, the Pspice simulation software was used to test the output voltage waveform of the power supply, and the rationality of the circuit was verified through experiments.