The utility model provides a take arc control device circuit breaker, arc control device in including the casing and locating the casing, arc control device includes striking room, explosion chamber and the exhaust passage that sets gradually according to gas flow direction, the explosion chamber is formed by the parallel superpose in piece interval of plural number piece arc extinguishing bars, the explosion chamber has air inlet that is linked together with the striking room and the gas outlet that is linked together with the exhaust passage, the exhaust passage is located and is used for between explosion chamber gas outlet and the casing lateral wall guiding gas into the casing outside, be equipped with on the exhaust passage and prevent the device that backflows, the device of preventing backflowing includes the diverging device and the guiding device of following gas flow direction and setting gradually.