±800 kV特高压直流线路工程中采用的耐张转角塔具有高、重、横担长特点，在现场特殊环境条件下，常规施工方法无法完成耐张塔边横担吊装。介绍了采用内悬浮主抱杆配合塔上人字抱杆顺利完成吊装边横担的特殊施工技术。

The tension towers used in ± 800 kV ultra-high voltage transmission line, tall and heavy, have long cross arms. As a result of the special environment in the field installation, it is difficult to hoist the edge cross arms of tension tower by conventional methods. Therefore, a special construction method is provided to hoist the edge cross arms successfully that the main gin pole suspended in inner tower is assisted by the herringbone pole.