The invention discloses a control circuit for a permanent magnet contactor, which comprises a normal control circuit and a forced breaking control circuit, wherein the normal control circuit is externally connected with an alternating current power supply, a coil and the forced breaking control circuit; a close instruction is generated when alternating current is supplied; a magnetic field of current through the coil and a magnetic field of a permanent magnet are in the same direction to achieve close of a movable iron core and a static iron core; when the alternating current is cut off, a breaking instruction is generated; the magnetic field of the current and the magnetic field of the permanent magnet are in opposite directions to achieve breaking of the movable iron core and the static iron core; the forced breaking control circuit is externally connected with the same alternating current power supply and a tripper; at the moment when the alternating current is cut off, when an acquired voltage signal of the normal control circuit is zero, delay is started; and after the delay, if the movable iron core and the static iron core are detected to keep attracted, the tripper is started for forced tripping to achieve the breaking of the movable iron core and the static iron core. According to the control circuit, the breaking of the movable iron core and the static iron core of the permanent magnet contactor can be controlled quickly and conveniently; when the permanent magnet contactor cannot be broken normally, and the purpose of reducing a potential safety hazard generated in a production process is achieved.