The invention provides a switch cabinet, and an operating mechanism and a linkage mechanism thereof. The linkage mechanism comprises an operating mechanism transmission main shaft, a circuit breaker transmission main shaft and a protection switch transmission main shaft, wherein a revolving member is assembled on the operating mechanism transmission main shaft in a standstill locking manner, a first driven member is assembled on the circuit breaker transmission main shaft in the standstill locking manner, and a second driven member is assembled on the protection switch transmission main shaft in the standstill locking manner; a first keyseat matched structure is arranged on each of the revolving member and the first driven member correspondingly, and the revolving member realizes separation and reunion with the first driven member through the corresponding first keyseat matched structure in the revolving process and drives the first driven member to revolve in at least one section of set journey in the revolving process of the revolving member; a second keyseat matched structure is arranged on each of the revolving member and the second driven member correspondingly, and the revolving member realizes separation and reunion with the second driven member through the corresponding second keyseat matched structure in the revolving process and drives the second driven member to revolve in at least one section of set journey in the revolving process of the revolving member. The linkage mechanism is convenient in operation, relatively low in failure rate, safe and reliable.