Transformer

The invention provides a transformer. Slopes are arranged at the top of a framework and are arranged along the length direction of a transformer body. An accommodating groove is formed in the middle of the framework, a coil is fixedly combined to the middle of the framework and in the accommodating groove, bent extension areas different in length are arranged at the bottom ends on two sides of the framework outwardly and are arranged in opposite directions, and welding guide angles are arranged on the side faces of the bent extension areas. The transformer is simple in structure, practical, safe, small in occupied area and convenient to mount.