Circuit breaker switch energy storage device and circuit breaker

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker switch energy storage device and a circuit breaker, the circuit breaker switch energy storage device comprises a mounting shell, a driving piece, a reduction gear set, an energy storage gear and a clutch, and the mounting shell is provided with a mounting cavity; the driving piece is arranged in the mounting shell in a penetrating manner; the reduction gear set is arranged in the mounting cavity and is in transmission connection with the output end of the driving part; the clutch is in transmission connection with the reduction gear set, the energy storage gear is in transmission connection with the clutch, the clutch is configured to allow power output by the reduction gear set to be transmitted to the energy storage gear and prevent power output by the energy storage gear from being transmitted to the reduction gear set, and the energy storage gear is used for driving a main shaft of a circuit breaker sw