Cable rapid alternate power supply replacement device and method suitable for multi-device group

The invention discloses a cable rapid alternate power supply replacement device and method suitable for a multi-device group. The cable rapid alternate power supply replacement device comprises a left power supply mechanism, a right power supply mechanism, an auxiliary combination control mechanism and a load cable switching rod. The left power supply mechanism and the right power supply mechanism each comprise a body, four protruding sliding blocks arranged on the upper surface of the body, a cable through hole penetrating through the front wall and the rear wall of the body, a cable plugging driving assembly arranged in the cable through hole and a cable sliding groove formed in the front wall of the body and communicated with the cable through hole. The left power supply mechanism and the right power supply mechanism are of a bilateral symmetry structure; the arc-shaped cable chute can provide a track for moving and switching of the load cable; and the auxiliary combination control mechanism comprises a sh