Abstract: In recent years, seismic wave CT (computed tomography) detection has been more and more widely used in the detection of ancient cultural relics. In this paper, the application of the method to the Ming tombs and Yongling detection project has obtained the distribution of the main mechanical parameters of Yongling Baocheng and identified the weak urban and severe weathering areas of Yongling Baocheng, which has further confirmed the scientific nature and applicability of the method.