Protective device for circuit breaker

The utility model relates to the technical field of circuit breakers, and discloses a protective device for a circuit breaker, which comprises a panel, a first protective cover and a second protective cover, the first protective cover and the second protective cover are symmetrically arranged on the surface of the panel in a sliding manner, and the top of the first protective cover and the top of the second protective cover are provided with sliding mechanisms; fixing rods are fixedly arranged at the bottom of the first protective cover and the bottom of the second protective cover, racks are fixedly arranged at the lower ends of the two fixing rods, a bearing seat is fixedly arranged at the bottom of the surface of the panel, a rotating shaft is fixedly arranged in the bearing seat, a gear is fixedly arranged at the tail end of the rotating shaft, and the gear is engaged with the two racks. According to the utility model, the circuit breaker can be effectively protected, the circuit breaker is convenient to