Abstract:[Objective] To compare the biomechanical characteristics of Kirschner wire (KW), Herbert screw (HS), micro plate (MP), micro plate combined with Kirschner wire (MP-KW), micro plate combined with Herbert screw (MP-HS) by finite element method. [Methods] A volunteer was selected to collect CT image data of the right elbow in the neutral position,and the Dubberley IIA type humeral capitulum fracture model was established by using Mimics and 3-matic software. On this basis, KW, HS, MP, MP-KW and MP-HS fixation models were established respectively. Different loadings were added to ANSYS software to analyze fracture end displacement and stress distribution. [Results] Under extension and buckling loadings, the displacement of fracture end was ranked in the descending order of KW model>HS model>MP-KW model>MP-HS model ,with statistically significant differences among the groups(P<0.05).Under torsional loading, the displacement was ranked in the descending order of KW model>MP-KW model>HS model>MP-HS model, which was statistically significant(P<0.05).Under eextension and buckling loadings, the internal fixation stress at the fracture line arranged up-down in the order of KW model>HS model>MP-KW model>MP-HS model, which was statistically significant(P<0.05). [Conclusion] For Dubberley IIA type humeral capitulum fracture, microplate and Herbert screw can provide better biomechanical stability and better healing environment for fracture.