The invention discloses a new structure transformer, which belongs to the energy conversion installment. It completely avoids the welding, the big vice-side electric conduction area can realizes the output of the big electric current, the big cooling surface, the good radiation effect, the simple structure, the convenient service. The technical characteristic of the invention is that it includes the ferrite core, the primary side winding, vice-side, the vice-side is composed of left place body and the right place body, the left groove and the right groove separately opened on the left place body and the right place body, the left groove divides the left place body into the left stele and the left outside place body, the left stele and the left outside place body are connected in the base; the right groove divides the right place body into the right stele and the right outside place body, the right stele and the right outside place body are also connected in the base; the iron core placed in the groove, the primary side winding rolled around the iron core, the insulating layer has separately establishes between the primary side winding and the vice-side winding, between the primary side winding and the iron core.