A rotary electrical plug is provided. The rotary electrical plug includes a rotary base, a first insert, a second insert, a first conductive connection lug, and a second conductive connection lug. The first insert and the second insert are circumferentially limited and mounted on the rotary base, the first insert is provided with a first conductive circular portion, the second conductive connection lug is provided with a second conductive circular portion, and the first conductive circular portion, the second conductive circular portion, and the rotary base are coaxial with each other. The first conductive connection lug is electrically connected to the first insert via the first conductive circular portion, and the second conductive connection lug is electrically connected to the second insert via the second conductive circular portion.