With the diversification of requirements in transmission line construction and renovation projects, augmented capacity conductor will be applied to AC/DC transmission line project with multiple voltage levels. In existing transmission line design, the sag of transmission line are evaluated by empirical formula, which is verified merely in a 60 meters small span test in laboratory, and is quite different from the actual project. To understand the temperature rise and sag characteristics of typical conductors and provide basis for the selection of transmission line conductor, the first domestic 200 m large span transmission line on actual strain tower for full scale test is built in Kunming UHV engineering technology lab to study on the temperature rise and sag characteristics of four kinds of conductors, including one kind of ordinary aluminum clad steel conductor and three kinds of typical augmented capacity conductor: carbon-fiber aluminum conductor composite core (ACCC), aluminum clad invar core aluminum alloy wire, and aluminum clad steel core aluminum alloy wire. Results show that ACCC and aluminum clad invar core aluminum alloy wire have better arc sag characteristics, and there are obvious temperature transfer points. The temperature transfer point of ACCC is about 75 ℃, and the transfer point of aluminum clad invar core aluminum alloy wire is about 105 ℃.