Mutual inductor handover test switching device and switching method thereof

The invention discloses a mutual inductor handover test switching device and a switching method thereof. The device comprises four sets of switching circuits, respectively a first group of secondary winding switching loop, a second group of secondary winding switching loop, a third group of secondary winding switching loop and a fourth group of secondary winding switching loop, each of the switching circuits comprises an I+ input end, an I-input end, a U+ input end, a U- input end, a first selector switch, a second selector switch, an output end E, an output end L and an output end D. The I+ input end and the U+ input end are connected to one end of a secondary winding of the transformer in parallel, the I- input end and the U- input end are connected to the other end of the secondary winding of the transformer in parallel, the I+ input end is connected to the output end D and the I- input end through a first selector switch, and the I- input end is connected to the output end E and the output end L through a