The paper aims to study the mechanical performance of typical joints of main inclined materials of angle steel tower. [Methods]The finite element analysis of mechanical performance of typical joints of angle steel tower under different parameters such as the presence or absence of auxiliary angle steel, thickness of auxiliary angle steel, thickness of connecting plate and bolt spacing was carried out. The stress distribution nephogram, ultimate bearing capacity and failure mode of joints of angle steel tower under ten- sion and shear were studied when the tightening torque was 300N·m, and then the simula- tion results of typical working conditions were effectively compared with the test results to verify the effectiveness of the finite element method.[Findings]The finite element simula- tion results are in good agreement with the test results, and the ultimate bearing capacity and failure mode obtained by simulation are close to test results. [Conclusions]Increasing the thickness of the connecting plate can enhance the ultimate bearing capacity of the joint. Increasing the thickness of auxiliary angle steel has little effect on the bearing capacity of the joint, but it is beneficial to enhance the initial stiffness of the joint. The bolt spacing has a significant impact on the bearing capacity of the joint. Too small bolt spacing is easy to cause stress concentration and reduce the ultimate bearing capacity. It is suggested that the minimum bolt spacing should not be less than 3 bolt diameters.