The invention relates to a rotation driving device of a module for an electric switch. Wherein the rotary drive is actuated by means of a rotary handle, the handle is rotated to enable the rotating shaft of the rotating driving device to move between at least two switch positions. Wherein the module can be installed between the rotation driving device and the rotation handle and comprises at leastone auxiliary switch, and when the module is installed between the rotation driving device and the rotation handle, under the condition that the rotation handle rotates, before reaching one switch position, the at least one auxiliary switch is switched first.