Abstract: The 2 in all parts of the world are suffering from the plaguing of the wind disaster, and many coastal cities are suffering from serious typhoons. The trip fault of the power transmission line caused by the typhoon has occurred frequently, so the risk assessment of the transmission line in the typhoon disaster is increasingly important. This paper summarizes some typical cases of typhoon around the world, and concludes the main reasons for the trip of transmission lines, including windage yaw, floater, tower damage, broken line, lightning stroke and so on. In view of the reasons of the trip, the Monte Carlo method, fuzzy mathematical model, machine learning algorithm, probability model, regulation method and improved electrical geometry model are introduced. The model and so on are applied to the risk assessment method and model of transmission line trip, and the preventive measures for transmission line failure under typhoon disaster are put forward. By summarizing the relevant literature on the risk assessment of power system at home and abroad, the existing literature on the risk assessment of power system in bad weather is more, but the research on the risk assessment of transmission line trip under typhoon disaster is less. Finally, this paper looks forward the development prospect of the risk assessment of transmission line trip under typhoon disaster.