The invention provides a generator damping control realization method based on power grid wide area information. The method is characterized in that a preposition data processing module receives wide area measurement data information, discriminates validity of current wide area data in real time and synchronously forwards the wide area data to a wide area control module; the wide area control module realizes discrimination of a power-grid-section low frequency vibration state and issues a control signal to a control interface unit. Through converting the control signal into a modulation analog quantity signal, generator power is adjusted, the power-grid-section low frequency vibration state is restrained and system damping is increased.