The utility model discloses a plug for an electric power communication distribution device comprising a male head and a female head. The center of the male head is provided with a signal cable connector; a plurality of cable plugs are symmetrically arranged relative to the center of the signal cable; an insulation rubber layer and a metal shielding are successively arranged on the outside of the signal cable connector; the insulation rubber layer is positioned on the outside of the cable plug; the length of the insulation rubber layer on the outside of the cable plug is smaller than that of the cable plug; the male head is provided with a signal cable inserting hole and cable inserting holes which are matched with the signal cable connector and the cable plugs; the inner side of the male head is provided with a slide groove two ends of which are provided with an inlet groove and a locking groove; the outside of the male head is provided with a sliding block matched with the slide groove; and the bottom of the cable inserting hole is provided with a spring. The plug for the electric power communication distribution device improve the deficiency of the prior art, greatly reduces the interference of the power line to the signal line and improves the fastness of the whole device.