X-ray fluorescence computed tomography is an emerging imaging modality that allows for the nondestructive reconstruction of the internal distribution of elements within a sample. The common use of X-ray excitation energy (up to approximately 20 keV) has necessitated the use of L-shell fluorescence for heavy elements. In this study, based on high energy X-ray at BL13W1 of the Shanghai Synchrotron Radiation Facility, we employed high-energy excitation for tomographic imaging of the heavy metals (rare earth elements) in fish teeth from deep-sea sediments on the micrometer scale using K-shell X-ray fluorescence. The virtual crosssectional distribution of La, Ce, Pm, Pr, Nd, and Sm were obtained, thereby providing a feasible approach for analyzing the enrichment mechanism of rare earth elements.