An inductor skeleton structure, comprising a pedestal and a main winding part , wherein the pedestal comprises a base , a fixing part , and an auxiliary winding part , the fixing part is disposed on the base , the base comprises a downward fitting surface and a circumferential side surface surrounding the fitting surface , and the auxiliary winding part is extended away from the base from the side surface ; wherein the main winding part has a main winding groove for winding a main coil ; wherein the main winding part comprises an upper end portion , a lower end portion and a main body portion , the main body portion is between the upper end portion and the lower end portion , and edges of both the upper end portion and the lower end portion are beyond the main body portion and define together with the main body portion the main winding groove ; the main winding part is fixed on a side, which is facing away from the fitting surface , of the base by the fixing part ; a downward surface of the auxiliary winding part is a welding surface , and the auxiliary winding part is used for winding an auxiliary coil capable of covering at least a portion of the welding surface ; and the fixing part is a fixing receptacle , wherein an inner contour of the fixing receptacle and an outer contour of the lower end portion are both in a circular shape, a circumferential limit piece is disposed on the fixing receptacle , and a circumferential limit matching piece is disposed on the lower end portion ; and the lower end portion and the fixing receptacle are capable of being limited from rotation around a center of the circular shape by matching of the circumferential limit piece and the circumferential limit matching piece . wherein the pedestal comprises a base , a fixing part , and an auxiliary winding part , the fixing part is disposed on the base , the base comprises a downward fitting surface and a circumferential side surface surrounding the fitting surface , and the auxiliary winding part is extended away from the base from the side surface ; wherein the main winding part has a main winding groove for winding a main coil ; wherein the main winding part comprises an upper end portion , a lower end portion and a main body portion , the main body portion is between the upper end portion and the lower end portion , and edges of both the upper end portion and the lower end portion are beyond the main body portion and define together with the main body portion the main winding groove ; the main winding part is fixed on a side, which is facing away from the fitting surface , of the base by the fixing part ; a downward surface of the auxiliary winding part is a welding surface , and the auxiliary winding part is used for winding an auxiliary coil capable of covering at least a portion of the welding surface ; and the fixing part is a fixing receptacle , wherein an inner contour of the fixing receptacle and an outer contour of the lower end portion are both in a circular shape, a circumferential limit piece is disposed on the fixing receptacle , and a circumferential limit matching piece is disposed on the lower end portion ; and the lower end portion and the fixing receptacle are capable of being limited from rotation around a center of the circular shape by matching of the circumferential limit piece and the circumferential limit matching piece . <EOS>