The invention discloses a power transmission line galloping monitoring method based on induced voltage of a ground wire. The power transmission line galloping monitoring method based on induced voltage of a ground wire assumes the induced voltage of the nth tower ground wire of one power transmission line to derive the galloping frequency, the galloping amplitude and the galloping position of thewire of the power transmission line, and includes the steps: wave recorders are arranged on the nth tower for recording voltage waveform, and one end of a voltage probe of the each wave recorder is connected to an overhead ground wire insulated from the tower body, and the other end is connected to the tower body; as the each wave recorder is configured with a trigger threshold, when the line works normally, the wave recorder does not record the voltage waveform; when the wire is galloping, the ground wire couples the induced overvoltage, and the wave recorder is triggered to record the voltage waveform; according to the signal analysis and electromagnetic field theory, the coupling coefficient between the overhead ground wire and the wire is calculated, so that the galloping frequency andthe galloping amplitude of the wire can be reckoned; and by means of analysis of the waveforms recorded by the wave recorders on different towers, positioning of the galloping position can be realized.