Transformer and winding structure thereof

The utility model provides a transformer and a winding structure thereof. The winding structure comprises a wire core, wherein a coil winding is arranged at the outer side of the wire core, each conducting wire for winding the coil group comprises a conducting wire body and a first insulation sleeve which sleeves the conducting wire body. The winding structure of the transformer comprises the wire core and the coil group which is arranged at the outer side of the wire core, and each conducting wire for winding the coil group comprises one conducting wire body and the corresponding first insulation sleeve which sleeves the conducting wire body, so that the insulation to the coil group can be realized, the power leakage situation of the transformer can be avoided, and the safety performance of the transformer can be improved.