The development and key technologies of high speed hybrid helicopter with single main rotor were reviewed. Firstly

the general concept about the layout type and control mode of high speed hybrid helicopter with single main rotor was briefly introduced. Then

the high speed hybrid helicopters with single main rotor were divided into three configurations based on their own forward flight power structure features. At the same time

the layout of different configurations and their development situations were described respectively. And on this basis

according to the present problems faced by high speed hybrid helicopter with single main rotor

the key technologies such as the overall layout design and optimization

transition mode control and distribution design were summarized and sorted out. Lastly

combined with the development trend of high speed helicopter at home and abroad and the characteristics of helicopter with this configuration

the development prospect of high speed hybrid helicopter with single main rotor was analyzed and some preliminary suggestions on its development in our country were put forward.