The invention relates to a transformer balance coil structure, and especially relates to a transformer balance coil structure comprising a transformer body; the features are that two sides of the transformer body are respectively provided with a first balance turn and a second balance turn having a same winding direction; the top ends of the first and second balance turns are connected through a shorting stub; bottom ends of the first and second balance turns are connected through a shorting stub, and then connected with a ground wire. The advantages are that transformer side-yoke additional magnetic flux caused by structural reasons can be canceled out, thus solving the transformer zero load loss, zero load current, load loss and noise increasing problems caused by half turn conditions; the transformer balance coil structure can be applied to a 220kV and above high capacity single-phase side-yoke containing auto transformer and a +/-200kV to +/-800kV high capacity single-phase side-yoke containing converter transformer, wherein the head end and tail end of the +/-200kV to +/-800kV high capacity single-phase side-yoke containing converter transformer have outgoing lines on different sides.