The invention discloses a transformer winding work state detection method based on normalization singular spectrum entropies. The method comprises the following steps: 1, performing frequency sweep excitation testing on transformer windings to obtain vibration frequency response curves of the transformer windings; 2, performing curve fusion on the vibration frequency response curves of transformer windings of M test points to obtain a vibration frequency response fusion curve of the transformer windings; 3, calculating the normalization singular spectrum entropies of the vibration frequency response fusion curves of the transformer windings; and 4, according to the change of the normalization singular spectrum entropies of the vibration frequency response fusion curves, determining the states of the windings: when the change of the normalization singular spectrum entropies exceeds 10%, determining that the windings of transformers are changed, wherein at the moment, maintenance processing needs to be performed timely so that severe faults can be avoided. According to the invention, diagnosis of the states of the transformer windings can be realized, and the change condition of the transformer windings is efficiently and flexibly detected; and at the same time, through fusion of the vibration frequency response curves of different test points, influences exerted by measuring errors on determining results are reduced to the minimum.