Abstract: This article reviews and analyzes the main research contents and key progress of the integrated development of air-breathing high-speed aircraft, including the stages of technology validation, practical application, and future reusable aircraft integration schemes. In the technology validation stage, designers proposed various integrated schemes and corresponding design methods for axisymmetric configurations and lifting-body configurations, which provided strong support for high-speed flight technology validation and enriched the design theory of integrated schemes. In the practical application stage, the engineering application of high-speed flight technology imposes stringent constraints on integration. The integration mainly addresses the conflicts between flow capture, equipment payload, and lift-to-drag ratio, gradually forming integrated schemes with belly intake layouts. For future reusable aircraft, a greater variety of propulsion modes and more complex aerodynamic shapes impose higher requirements on integration design. Efficient and wide-range power systems, highly integrated wing-body blended configurations, and more advanced intake layout schemes are important directions for the integrated design of air-breathing high-speed aircraft.