An electromagnetic repulsion actuator for a circuit breaker, comprising: a housing; a first fixed electrode provided inside the housing and having therein an operating space open at both sides; a pair of movable electrodes installed in the first fixed electrode at both sides of the operating space thereof, the movable electrodes being capable of reciprocally moving and being electrically connected to the first fixed electrode; second fixed electrodes respectively spaced apart from the first fixed electrode and installed inside the housing at both sides thereof, and selectively contacting the pair of movable electrodes to be electrically connected thereto, thereby transferring power supplied from a first side to a second side; and actuating coils (30, 40) selectively moving the movable electrodes in directions of being separated from the second fixed electrodes by generating electromagnetic force from induced current, wherein the actuating coils (30, 40) include: a close coil provided inside the operating space of the first fixed electrode, generating electromagnetic force from induced current in the movable electrodes at first ends thereof by using applied current, and moving the movable electrodes toward the second fixed electrodes; open coils installed to be respectively spaced apart from both sides of the close coil, generating electromagnetic force from induced current in the movable electrodes at the first ends thereof by using applied current, and moving the movable electrodes so that the movable electrodes separate from the second fixed electrodes. a housing; a first fixed electrode provided inside the housing and having therein an operating space open at both sides; a pair of movable electrodes installed in the first fixed electrode at both sides of the operating space thereof, the movable electrodes being capable of reciprocally moving and being electrically connected to the first fixed electrode; second fixed electrodes respectively spaced apart from the first fixed electrode and installed inside the housing at both sides thereof, and selectively contacting the pair of movable electrodes to be electrically connected thereto, thereby transferring power supplied from a first side to a second side; and actuating coils (30, 40) selectively moving the movable electrodes in directions of being separated from the second fixed electrodes by generating electromagnetic force from induced current, wherein the actuating coils (30, 40) include: a close coil provided inside the operating space of the first fixed electrode, generating electromagnetic force from induced current in the movable electrodes at first ends thereof by using applied current, and moving the movable electrodes toward the second fixed electrodes; open coils installed to be respectively spaced apart from both sides of the close coil, generating electromagnetic force from induced current in the movable electrodes at the first ends thereof by using applied current, and moving the movable electrodes so that the movable electrodes separate from the second fixed electrodes. a close coil provided inside the operating space of the first fixed electrode, generating electromagnetic force from induced current in the movable electrodes at first ends thereof by using applied current, and moving the movable electrodes toward the second fixed electrodes; open coils installed to be respectively spaced apart from both sides of the close coil, generating electromagnetic force from induced current in the movable electrodes at the first ends thereof by using applied current, and moving the movable electrodes so that the movable electrodes separate from the second fixed electrodes.