An operation mechanism for a dual-power automatic transfer switch, the dual-power automatic transfer switch being configured to switch between a dual-off position, a first power-on position and a second power-on position, the operation mechanism comprises: a frame; a rotating disk, rotatably mounted to the frame; a first elastic member, wherein one end of the first elastic member is configured to abut against the rotating disk, and the other end of the first elastic member is mounted to the frame; a driving disk, configured to rotate in cooperation with the rotating disk when the rotating disk rotates; a driving rod, mounted on the driving disk and configured to rotate together with the driving disk and connected with a movable contact bracket, wherein at the dual-off position of the dual-power automatic transfer switch, when the rotating disk rotates in a first direction, the first elastic member deforms to store energy, and after the rotating disk rotates by a predetermined angle, the rotating disk abuts against the driving disk so that the driving disk also rotates in the first direction, then the first elastic member passes through a "dead point", and the rotating disk and the driving disk continue to rotate in the first direction under an action of the first elastic member, so that the driving rod rotates in the first direction and drive the movable contact bracket to rotate, so as to realize a switching of the dual-power automatic transfer switch from the dual-off position to the first power-on position, characterized in that the rotating disk comprises a transmission disk, wherein when the rotating disk rotates, the transmission disk is configured to, after rotating by a predetermined angle, cooperate with the driving disk to transmit a rotation of the rotating disk to the driving disk. a frame; a rotating disk, rotatably mounted to the frame; a first elastic member, wherein one end of the first elastic member is configured to abut against the rotating disk, and the other end of the first elastic member is mounted to the frame; a driving disk, configured to rotate in cooperation with the rotating disk when the rotating disk rotates; a driving rod, mounted on the driving disk and configured to rotate together with the driving disk and connected with a movable contact bracket, wherein at the dual-off position of the dual-power automatic transfer switch, when the rotating disk rotates in a first direction, the first elastic member deforms to store energy, and after the rotating disk rotates by a predetermined angle, the rotating disk abuts against the driving disk so that the driving disk also rotates in the first direction, then the first elastic member passes through a "dead point", and the rotating disk and the driving disk continue to rotate in the first direction under an action of the first elastic member, so that the driving rod rotates in the first direction and drive the movable contact bracket to rotate, so as to realize a switching of the dual-power automatic transfer switch from the dual-off position to the first power-on position, characterized in that the rotating disk comprises a transmission disk, wherein when the rotating disk rotates, the transmission disk is configured to, after rotating by a predetermined angle, cooperate with the driving disk to transmit a rotation of the rotating disk to the driving disk.