The invention relates to the technical field of conductive connection, and discloses an electric connection device easy to replace a cable, which comprises a plug, conductive
insertion pieces are fixed on the lower surface of the plug, and the inner side of the plug is provided with binding posts corresponding to the conductive
insertion pieces; the mounting block is fixed at one end of the inner side of the plug, a rotary conductive
assembly is arranged on the inner side of the mounting block so as to be electrically communicated with the conductive
insertion pieces when the mounting block rotates, and a connecting wire matched with the rotary conductive
assembly is arranged on one side wall of the
binding post; by arranging the mounting block, the connecting wire, the threaded cylinder, the limiting
assembly, the rotary conductive assembly and the mounting
ring block, the device can quickly replace the conductive cable without an additional tool, is simple and convenient to operate, improves the use convenience, and can well avoid the situation that the plug and the socket rotate in different directions after the conductive cable is mounted, so that the use is convenient. Therefore, the conductive cable is twisted.