An operating mechanism for a dual-power changeover switch and the dual-power changeover switch are disclosed. The operating mechanism includes: a manual operating device arranged on a first side of a housing of the dual-power changeover switch and configured to rotate around a rotation axis under the action of a driving force; a synchronizing rod connected to the manual operating device in a transmission way, wherein the synchronizing rod includes a first end and a second end and is configured to be rotatable around an extension direction thereof when the manual operating device rotates; a first driving member arranged on the first end of the synchronizing rod and connected with a first driving disc assembly at a first end of a main shaft shared by breaking units of poles; and a second driving member arranged on the second end of the synchronizing rod and connected with a second driving disc assembly at a second end of the main shaft, wherein the first driving member and the second driving member are configured to rotate in a same direction simultaneously, with the synchronizing rod as a rotation shaft, when the synchronizing rod rotates, so as to drive the first driving disc assembly and the second driving disc assembly to rotate, thereby driving the main shaft to perform an opening motion and a closing motion.