The invention provides a transformer, which comprises a winding and a core, wherein the winding is wound on the core; the winding is made of an aluminum alloy wire. The winding of the transformer is made of the aluminum alloy wire, so that the anti-short circuit capacity of the transformer is better than that of a transformer of adopting an aluminum wire as the winding, and the problem of poor anti-short circuit capacity of the aluminum winding transformer is further solved. Compared with a transformer of adopting a copper wire as the winding, the transformer provided by the invention is higher in cost performance.