The invention relates to a voltage-regulating winding modifying model. The voltage-regulating winding modifying model comprises two side rings and a middle ring positioned in the middle of the two side rings, wherein the circumferences of the two side rings and the middle ring are uniformly and fixedly provided with at least three arc supporting bars; the arc supporting bars are divided into convex supporting bars and concave supporting bars; one side of each convex supporting bar is provided with a convex bar, and the other side of the convex supporting bar is fixed on the circumferences of a corresponding side ring and the middle ring; one side of each concave supporting bar is provided with a groove and is buckled on the convex bar of the convex supporting bar, and the other side of the concave supporting bar has an arc shape; and the circumferences of the two side rings and the middle ring are uniformly and fixedly provided with at least three channel steel supporting bars. The voltage-regulating winding modifying model comprises the two side rings and the middle ring, and the rings are provided with the assembly of the arc supporting bars, so that the voltage-regulating winding modifying model is convenient to manufacture, has a low price, is suitable for the production of products of various specifications in small batch and improves production benefits.