The utility model discloses a conducting wire connecting assembly comprising a connection main body with a tubular structure. An outer side of the connection main body is provided with an external thread. The connection main body is provided with two or more fastening nuts which are in threaded connection with the connection main body. One end of the connection main body is formed by a copper tube. An end part of the copper tube is formed by two or more outward expanded first fastening wing plates. The other end of the connection main body is formed by an aluminum tube. An end part of the aluminum tube is formed by two or more outward expanded second fastening wing plates. In the above structure, the wire connecting assembly is connected with a copper wire and an aluminum wire through the copper tube and the aluminum tube respectively, the structural design of the fastening wing plates (reverse application of expansion screws) is employed by the fastening end parts of the tubes, combined with the effects of the fastening nuts, the connection between the conducting wire connecting assembly and the conducting wires can be realized only through screwing the fastening nuts, thus the connection operation between the conducting wires is simplified, and through the structural design, the reliable connection state between the connection main body and the conducting wires can be realized.