Abstract: The quality test of large-volume concrete such as wind power foundation has always been an engineering problem. The conventional nondestructive testing methods have problems such as the shallow detection distance, the inability to penetrate the dense steel mesh inside, and the inability to detect on a measurable surface. In order to determine the location of cold joints and evaluate their quality, a wind power foundation in Inner Mongolia has undergone nondestructive testing due to its construction. In the case of overcoming Lamb wave interference and applying mathematical phased array to enhance the detection depth and resolution, acoustic scattering imaging technology can clearly show the results of concrete layered interface, cold joint distribution and intensity distribution. The results show that the low-speed interface is consistent with the fracture location displayed by drilling and coring, providing detailed information for subsequent targeted repair work.