The present invention relates to a breaker arc-control device. The device comprises an arc-control chamber, a curve runway and an arc-control grid plate set located in the arc-control chamber. The arc-control grid plate set comprises a plurality of arc-control grid plates; the curve runway is located between a U-shaped first end tab and an arc-shaped second end tab, one end of the first end tab is extended to the arc-control grid plate set, and the other end of the first end tab is extended to the fixed contact of a breaker; one end of the second end tab is extended to the arc-control grid plate set, and the other end of the second end tab is extended to the moving contact of the breaker and corresponds to the portion of the movement locus of the moving contact of the breaker; and an arc-control grid plate located at the middle of the arc-control grid plate set is extended facing the direction of the curve runway to form a palping foot, and the palping foot is configured to divide the curve runway close to the arc-control grid plate set into two parts consisting of a first curve runway and a second curve runway. The arc-control device can shorten the arc-control time and improve the survival ability of the breaker under a short-circuit heavy current.