Transformer with split and pluggable iron core for screening test

A transformer with a split and pluggable iron core for screening test relates to the field of transformers. Time is wasted and a trouble is brought during plug-in and plug-out of a transformer iron core, and the iron core is easy to damage when the iron core is disassembled and plugged. The transformer comprises iron cores, an excitation coil, a response coil, an insulation support plate, a support rack and a lifting rack, wherein the excitation coil and the response coil sleeve at outer sides of the iron cores, the iron cores are two posts of iron cores formed by lamination of lamination sheets, each iron core comprises an upper iron core and a lower iron core, the lower iron core is in a U shape containing two iron core posts, and the upper iron core is line-shaped and can be connected to the tops of the lower iron cores in a pluggable way. With the transformer disclosed by the technical scheme, the upper iron core can be integratedly plugged in and plugged out, the transformer is simple, convenient and rapid, and is low in plugging influence and high in electrical stability, and the iron core connection quality is still stable and reliable.