Transformer for luminescence of LED

The utility model relates to a transformer for luminescence of an LED, which comprises a winding frame and first and second iron cores. The winding frame comprises first and second retaining bodies and a winding part connected between the first and second retaining bodies. The winding part is provided with a magnetic conduction channel running through the first and second retaining bodies. The first retaining body is also provided with a pin part. The first iron core comprises a substrate and a pair of lateral parts and an insertion part which are all arranged on the substrate, wherein the insertion part of the first iron cores are inserted in the magnetic conduction channel; the substrate of the first iron cores are shaded on the bottom surface of the first retaining body of the winding frame; the pair of lateral parts are respectively shaded on two opposite long sides of the winding frame; the second iron cores are shaded by the top surface of the second retaining body covered on the winding frame; two oppo