Theinstantaneous surface temperaturemonitoringis always challenging for the aeroengine hot components composed of C/SiC composite materials.An measurement method of instantaneous surface temperature monitoring is studied for the aeroengine hot components composed of C/SiC composite materials. The NiCrZrO2 composite transition layer isdeposited on the surface of C/SiC composite by magnetron sputtering and electroplating.Insulating film SiO2, NiCr/NiSithin film thermocouple and SiO2 protective filmareprepared sequentially on the NiCrZrO2composite metal transition layer on the surface of C/SiC composite prepared by magnetron sputtering.The insulation properties of SiO2 insulating films with different thicknesses areinvestigated. The results indicatethat the insulation resistance of SiO2 films with a thickness of 3 μm is about 164×109 Ω. The experimental results of the static performance of the sensor show that the Seebeck coefficient is 421 μV/℃ and the nonlinear error is 152% in the range of 50～600℃. The dynamic performance of the sensor is studied by the combination of theoretical calculation and experiment. The results show that the dynamic response time of the sensor is in the microsecond range, which can realize the transient temperature test. The temperature measurement experiment shows that the sensor can meet the requirements of transient temperature detection ranged from room temperature to 600℃.