In tube hydroforming processes involving axial feeding, the accuracy of finite element (FE) simulations is influenced by multiple factors, including mesh design. This study investigates how element mesh shapes affect the simulation accuracy of the tube bulging process using ABAQUS. By comparing simulation results using triangular and quadrilateral mesh elements with experimental data, the study reveals a significant correlation between mesh shape and simulation reliability. Quadrilateral elements showed superior performance, with average errors within 10%, whereas triangular elements produced larger deviations. These findings provide guidance for optimizing meshing strategies in FE analyses of tube hydroforming and highlight broader implications for mesh quality in other plastic forming processes.