The invention discloses a control method and system for far-end line load shedding of a generator set speed regulation system, and relates to the power generation technology field. The technical main points are that the control method includes the steps: collecting the frequency of a generator set; calculating the rate of change of the frequency relative to time, comparing the rate of change with the rate of change of the frequency of the generation set that undergoes the normal speed regulation, determining that load shedding occurs if the rate of change is greater than the rate of change of the frequency of the generation set that undergoes the normal speed regulation, and recording the rate of change of the maximum frequency; obtaining a load variance corresponding to the rate of change during far-end line load shedding according to a curve showing the rate of change of the maximum frequency-the load shedding variance; and conducting speed regulation on the basis of the load variance.