High-altitude wind power is a new class of wind energy converters. The use of a tethered aircraft to connect the aircraft to a ground base station via one or more tethered cables enables wind energy to be captured in an atmosphere that is not accessible to conventional wind turbines. The type of aircraft is at the heart of the high-altitude wind power system. This paper mainly introduces the three main types of kites in the system and their respective advantages and disadvantages, and establishes a mathematical model of the single line system. The simulation proves that the kite model can effectively control the parameters such as heading angle and azimuth in flight. It provides a reference for the selection and application of kite models in high-altitude wind power generation systems.