Abstract：The longitudinal and transverse wave velocities of frozen clays are measured by UVM-2 ultrasonic instrument and 500 kHz broadband ultrasonic transducer at the temperature of －1°C，－3°C，－5°C，－7°C，－10°C，－12°C，－15°C，－17°C and－18°C. As indicated by the results，the lower the temperature is，the greater the wave velocity is. At the temperature higher than －4°C，the relationship between wave velocity and temperature is linear. At the temperature about－17°C，the increment of wave velocity is very small. The relationship between the wave velocity and temperature is analyzed theoretically. By means of elasticity theory，elastic modulus and Poisson′s ratio are calculatied.
