The invention discloses a plug. The plug comprises a plug body and a conductive piece fixed on the lower end face of the plug body. The plug body comprises an upper base and a lower base. The upper base is rotatably connected with the lower base. A first conductive ring and a second conductive ring are embedded in the upper end face of the lower base. An annular groove is arranged on the lower endface of the upper base. A third conductive ring and a fourth conductive ring are embedded in the inner bottom of the annular groove. Conductive pins which are electrically connected with the first conductive ring and the second conductive ring are fixed on the third conductive ring and the fourth conductive ring respectively. A limiting structure is arranged between the upper base and the lower base. After the structure is used, interference of wires of adjacent plug bodies can be avoided.