Abstract: Due to the large capacity and high-temperature resistance, the aluminum conductor composite core (ACCC) wires can effectively achieve the purpose of increasing the line capacity without changing or replacing a small rate tower. This can also result in high economic benefits. In the construction of a replacement of ACCC wires in 500 kV Jiangjin/Jiangling line, stretch one machine is used to direct the extension of the ACCC wires. This plan has effectively improved the capability of wire replacement construction. It has also shortened the 1/3 duration as compared to the conventional construction plan. In this paper the key points of the construction control are analyzed and summarized from the aspects of selecting the engineering equipment and wire connection, and its economic and social benefits are compared with traditional construction plan so as to promote its application.