The invention relates to the field of solid lubricating, in particular to a high-performance high temperature solid self-lubricating coating and a preparation method thereof, aiming at solving the problem that parts of a machine (such as a foil air bearing) are worn when in operation from low temperature (minus 55 DEG C) to high temperature (800 DEG C). The high temperature solid self-lubricating composite coating adopts a composite powder composed of NiCr, Cr2O3, Ag and eutectic BaF2/CaF2, wherein NiCr is an adhesive, Cr2O3 is a wear-resistant phase, Ag is a low temperature lubricating agent, and the eutectic BaF2/CaF2 is a high temperature lubricating agent. The NiCr powder, Ag powder and the eutectic BaF2/CaF2 powder are all prepared by adopting the ultrasonic gas atomization technology, and the composite powder is prepared by adopting a mechanical mixing method. The high temperature solid self-lubricating coating is prepared by adopting the atmosphere plasma spraying technology. The high temperature solid self-lubricating coating in the invention can avoid or reduce wear of the parts of the machine running at high speed and high temperature (such as wear of a foil and a shaft of the foil air bearing), thus expanding working temperature and speed of the machine in operation and having important industrial application value.