The invention provides a winding structure of a single rectifier transformer. The winding structure is that net side windings are connected in parallel and provided with two phase-shift angles, and an axial double split or four-split manner is performed; each net side winding is uniform in capacity distribution; the valve side is provided with four windings which can respectively generate two groups of magnetic flux at different phases; four windings at the valve side are in a form of axial four-split or the combination of axial double-split and radial three-split; an iron core compensating magnetic spoke for compensating unbalanced magnetic flux caused by different phase-shift angles at the top and bottom of the net side is arranged between the upper part and the lower part of an iron core. According to the improved winding structure, the net side phase shift of single 24-pulse transformer is effectively achieved; the winding structure has the characteristics of being simple and reasonable in structure, reliable in performance, small in cost, small in space used, balanced in rectifier current, small in phase-shift angle deviation, small in unbalance degree of no-load voltage of the net side winding, and balanced in commutating reactance.