Objective　To simulate the dynamic procedure of bullet damage to the three-dimensional (3D) finite element (FE) model of mandible from different angle with computer-aided engineering. 　Methods　A mandible was scanned by thin-layer CT

and then CT images were analyzed and managed with Dicom standard and Mimics software. At the same time

a simulation of the 3D FE model penetrated by a 7.62-mm bullet was carried out through LS-DYNA software from different angle. 　Results　A 3D FE model of human mandible was established with highly-identical geometric size

and the dynamic process of bullet damage to the model was successfully simulated. The results of this work indicated that the exit wounds in model tended to be larger than the entrances resulting from the same shot. 　Conclusion　Thin-layer CT and Dicom standard can improve the efficiency of establishment of a more precise 3D FE model of mandible. The procedure of bullet damage to the mandible can be simulated by the finite element.