A permanent magnet drive on-load tap-changing switch including a changing switch circuit that includes structurally identical odd- and even-numbered tap-changing circuits. The circuits include working contactors and dual-contact synchronous transition contactors made of primary and secondary contactors. The contactors each face directly a moving contactor, which are connected in parallel. A permanent magnet is fixed on each moving contactor and face directly on the other extremity thereof a moving contactor driving mechanism. The mechanism changes a force applied to the magnets, allowing the moving contactors to come into contact with or be separated from the working and transition contactors, thus implementing changeover from one tap to another tap. The switch is structurally simple and convenient to use, obviates the need for a high-speed mechanism, implements changing by the direct actions of the contactors, operates at high speed and reliably, and has a low failure rate and an extended service life.