The invention belongs to the technical field of high-voltage test, and provides an AC withstand voltage test method for the large-capacity power equipment. A series reactor group is connected in series to a to-be-detected device, and meanwhile a parallel compensation reactor group is connected in parallel to the two ends of the to-be-detected device, so that the AC withstand voltage test of the large-capacity power equipment is realized, wherein the series reactor group and the parallel reactor group are both a reactor group formed by combining a plurality of single reactors in parallel or inseries. According to the AC withstand voltage test method for the large-capacity power equipment, the capacity requirement of the test equipment is greatly reduced; the volume and the weight of the test equipment are reduced, thereby reducing the loss of electric quantity; and the test cost is reduced.