Double-break switch fault current limiting device

The invention discloses a double-break switch fault current limiting device which comprises a shell, one side of the shell is fixedly connected with a wire inlet insulator and a wire outlet insulator, the wire inlet insulator and the wire outlet insulator are internally and fixedly connected with a wire inlet terminal and a wire outlet terminal respectively, and the bottom end of the wire inlet terminal and the bottom end of the wire outlet terminal penetrate into the shell. The bottoms of the wire inlet terminal and the wire outlet terminal are connected with upper buses, the two upper buses are connected with connecting buses, a current limiter is connected between the two connecting buses, the two upper buses are connected with vacuum arc extinguish chambers, one sides, far away from the upper buses, of the two vacuum arc extinguish chambers are connected with lower buses, and a bridging bus is connected between the two lower buses. The two vacuum arc extinguish chambers are connected with insulating pull