Abstract: In this paper,the jaw bone and teeth of an ancient pig unearthed from a historic site were imaged using a micro-CT.The three-dimensional(3D) structure of the sample was quantitatively calculated based on data-constrained modeling(DCM).The multi-scale structure of the sample including those smaller than CT imaging resolution size was obtained.The multi-scale connectivity of pore and high X-ray absorption compositions in the sample were calculated respectively.The 3D distribution form of pore and high X-ray absorption compositions clusters was obtained.Compared with common image threshold segmentation method,DCM efficiently reduces the influence of partial volume effect on image analysis.The results of this study provide a data basis for the internal morphological measurement and structural analysis of archaeological samples.The method presented in this paper can be applied to the digital modeling and archiving of archaeological samples.