Wind power foundation prefabricated part connecting structure and connecting method

The invention discloses a wind power foundation prefabricated part connecting structure which comprises any two or more adjacent prefabricated parts, each prefabricated part comprises a stand part close to the center of a wind power foundation and a supporting part away from the center of the wind power foundation, and a shear-resistant grouting layer is arranged between the stand parts of the adjacent prefabricated parts. Bolt counter bores are formed in the end faces, deviating from the supporting parts, of the stand parts along the boundaries perpendicular to the ground, arc-shaped screw holes are formed between the adjacent bolt counter bores in the stand parts of different prefabricated parts in a penetrating mode, the arc-shaped screw holes penetrate through the shear-resistant grouting layer, and arc-shaped bolt and nut assemblies are arranged in the arc-shaped screw holes in a matched mode; the end faces, facing the supporting parts, of the stand parts of the adjacent prefabricated parts are each prov