Thermal protection technology is the key factor to the design of hypersonic vehicle. The different parts
of hypersonic vehicle undertake different kinds of force and thermal loads, so different thermal protection projects are
required. The paper takes HTV-2, X-37B and NASA suborbital transportation vehicle as examples, introduces three
kinds of thermal protection projects and discloses the latest developments of thermal protection technology. In future,
the development of material technology and innovative thermal protection program can improve the technology maturity
and the scope of application of thermal protection system and provide a guarantee for the design of each kind of hyper-
sonic vehicle.