The invention discloses a bistable permanent magnetic three-phase breaker which comprises a base, a housing, a load-side three-phase lead joint and a power-supply-side three-phase lead joint. The housing is arranged on the surface of the base. The housing is internally provided with a coil. The surface of the housing is provided with an upper wiring tube and a lower wiring tube. One side of the housing is provided with the load-side three-phase lead joint, and the other side is provided with the power-supply-side three-phase lead joint. The housing is internally provided with an upper holdingpermanent magnet. A power-supply-side static contact is arranged beside the upper holding permanent magnet. A lower holding permanent magnet is arranged beside the power-supply-side static contact. Asliding iron core is arranged beside the lower holding permanent magnet. A load-side moving contact is arranged below the sliding iron core. A power-supply-side moving contact is arranged beside the load-side moving contact. The bistable permanent magnetic three-phase breaker is advantageous in that, after state conversion, energy consumption caused by electromagnet attracting is not required; noise and magnetic field influence which may be caused in continuous operation of the electromagnet are prevented; and furthermore environment-friendly performance, energy-saving effect and high switching speed are realized.