The invention discloses a wind farm generation right replacement capacity evaluation method for minimizing the wind curtailment capacity. Current generation right replacement of a wind farm, a thermal power plant and a hydraulic power plant is carried out, so that the new energy power generation capacity is maximized, and wind curtailment and light curtailment are minimized. The rotational correction process of the transacted capacity is simplified; only current replacement capacity evaluation is carried out; and the calculation process is simplified, so that the target of improving the new energy utilization rate and the profits of power generation enterprises is achieved.