Abstract: New requirements are put forward to the patterns of energy supplying and utilizing method due to the development and progress of human society. Changes and challenges of traditional power transmission technologies are deeply influenced because the energy supplying and demanding, large capacity and high efficiency of converter are needed to be balanced due to the exits of large-scale clean energy. Based on the traditional transmission technology, the power transmission capacity, efficiency and intelligence environment friendly can be promoted by using advanced transmission technology. Aiming at the developments of advanced power transmission technology in China, the development process and results of FACTS, UHVDC, VSC-HVDC, and DC grid are summarized, and the development directions of the related key technologies fields in future are pointed out.