Wire disconnecting and connecting training device

The invention relates to a disconnection and connection training device, which comprises a substrate, and a power supply, an output bus, a terminal connector, a microprocessor, an input bus and a display which are arranged on the substrate, and is characterized in that the power supply is used for outputting one or more level signals; one end of the output bus is electrically connected with the output end of the power supply, and the other end of the output bus is provided with a plurality of first terminals in a branched manner; the input terminal side and the output terminal side are both provided with a plurality of wiring point positions, and the first wiring terminal can be electrically connected with any wiring point position on the input terminal side; one end of the input bus is connected with a pin of the microprocessor, and the other end of the input bus is provided with a plurality of second wiring terminals which can be electrically connected with any wiring point on the output terminal side; and