Abstract: A power transmission switch includes a switch key for controlling a power supply to convert an output state. The switch key is provided with two adjacently arranged slots; and the slots are used for plug-in cooperation with a plug-in sheet. The plug-in sheet is used for plug-in cooperation with two switch keys arranged side by side respectively, so that the two switch keys realize linkage control. The plug-in sheet has respectively plug-in cooperation with the two switch keys arranged side by side to enable the two switch keys to realize linkage control, and thus a power transmission switch is provided to facilitate the linkage control of the two switches.