The pulse transformer is used to isolatedly drive the bridge topological MOSFET circuit to obtain the high voltage pulse with the amplitude of about 5 000 V and rise time of 48 ns. The output high-voltage amplitude can be changed by controlling the power supply voltage of the Royer oscillating circuit, and the output high voltage is four times of the output high voltage of the Royer oscillating circuit, which greatly reduce the withstand voltage of the device and the device size and power consumption. The output high voltage is electrically isolated from the input and control circuit, reducing electrical interference to other circuits. It can be widely used in laser, ground penetrating radar, high-speed camera, electromagnetic pulse research, accelerators and high-energy physics and other fields.