The invention relates to a high-speed switch based on a permanent magnet holding mechanism. The high-speed switch is characterized in that an expulsive force plate (6) sleeves a lower guide rod (4); and opening coils (5) are installed above the expulsive force plate (6) and closing coils (7) are installed below the expulsive force plate (6). A static iron core for holding is installed above a moving iron core (9) for holding; and a closing holding permanent magnet (11) is installed in the middle of the static iron core. A static iron core for holding is installed above the moving iron core (9) for holding and an opening holding permanent magnet (14) is installed in the middle of the static iron core. According to the invention, the high-speed switch having advantages of simple structure, fast moving speed, and reduced work links, and high reliability is provided. The opening speed of the switch can be increased effectively; and with a fault current zero-point detection technology, arc time is shortened and contact ablation is reduced, so that the breaking capacity of the circuit breaker is strengthened.