The invention discloses a method for estimating distribution of wind resources capable of generating electricity for a millions-kilowatt wind electricity base. The method mainly comprises the steps that it is assumed that N anemometer towers are arranged in the wind electricity base to be measured, the historical wind speed data of each anemometer tower Ti (i=1, 2, ..., N) within the first preset hours are acquired; shortest distance clustering is carried out on the anemometer towers at each compete hour point according to the difference of the average values of the wind speed of the anemometer towers of the first preset hours, and the anemometer tower Ti (i=1, 2, ..., N) with the smallest geographical distance Ri with a point to be solved is found; other anemometer towers in the group where the anemometer tower Ti is located are determined, and interpolation is carried out on the selected anemometer towers through an inverse distance weighting method to obtain the wind speed and wind direction estimation value of an unknown point. The method for estimating distribution of the wind resources capable of generating the electricity for the millions-kilowatt wind electricity base can overcome the defects that in the prior art, the utilization rate of the wind resources is low, power supply reliability is poor, and the operating stability of a power system is poor, and the advantages of being high in wind resource utilization rate, good in power supply reliability and good in power system operating stability can be achieved.