Abstract: The correlation between wave velocity and temperature is the premise and foundation of ultrasonic solid temperature measurement. Due to the complex waveform in solid medium, the wave propagation characteristics are also very complex, and the theoretical formula of wave velocity and temperature when temperature changes has not been given, which greatly limits the accuracy and application range of ultrasonic solid temperature measurement. Therefore, the temperature sensitivity of ultrasonic solid temperature measurement is theoretically analyzed, and a theoretical experimental platform of ultrasonic solid temperature measurement based on acoustic time measurement is built. On this basis, the experimental study on the correlation between wave velocity and temperature is carried out, and the relationship between shear wave velocity and temperature and its influence law are obtained.It provides a basis for ultrasonic solid temperature measurement at high temperature.