Ultrasonic wave and stress wave methods were used to evaluate the stress wave,or ultrasonic transmission speed（v）,and dynamic modulus of elasticity（MOED） to examine the influence of CCA treatment on wood properties.Forty seabuckthorn rafters,before and after a CCA treatment,were tested.Through an analysis of Paired Student’s t-test,the results showed that CCA treatment had a significant effect on wood density,but had little influence on stress wave or ultrasonic transmission speed and dynamic modulus of elasticity.The data obtained by the two NDT methods indicated a high-level of consistency which provided a certain dependability of the test results.