The utility model relates to an operating device for repairing and maintaining a breaker. The device comprises a fixing base, a lead screw and nut mechanism and a transmission connecting lever, wherein the lead screw and nut mechanism is arranged on the fixing base and is equipped with a linear moving output end and a torque input end; one end of the transmission connecting lever is assembled to a corresponding power output main shaft of the breaker by a rotating stopping manner; the linear moving output end of the lead screw and nut mechanism is in transmission connection with the other end of the transmission connecting lever, so as to drive the transmission connecting lever to swing by a reciprocating manner, and therefore, the corresponding power output main shaft is driven to rotate by the reciprocating manner. The operating device further comprises a jack; the jack is equipped with an ejector rob for ejecting a power output connecting lever on the power output main shaft. With the adoption of the operating device for repairing and maintaining the breaker, the breaker can be slowly opened and closed.