An overvoltage protection method and device of an electronic governor in an aerial vehicle, and an aerial vehicle with the device are provided. The electronic governor is configured to control a motor. The method includes: collecting a DC bus voltage of the electronic governor; when the DC bus voltage is greater than a first voltage threshold and less than or equal to a second voltage threshold, adjusting a control parameter of the electronic governor based on a difference between the DC bus voltage and the first voltage threshold, such that the electronic governor controls the motor based on the adjusted control parameter to restrain further rise of the DC bus voltage, in which the second voltage threshold is greater than the first voltage threshold.