Wind energy is one of the most important ways for clean energy, and develops rapidly in recent years, which is pollution-free, renewable and readily available. Compared with the traditional low-altitude wind power generation, tethered floating wind power generation has a greater value and potential. There are a number of countries which have carried out relevant research and made many achievements. The research on the present tethered floating wind power generation technology is reported in this paper, which contains a conclusion of four kinds of tethered floating wind power generation technologies, an analysis of operating conception and technical feature, a discussion of critical points including design and manufacture of light and high strength tether, advanced envelope composite material, stable and intelligent control, aircraft overall design of efficient wind power generation and so on, as a foundation for future development and further research on this direction.