Abstract: Angle members are the main components of transmission lattice tower,some of which need no constraint holes due to technics or installation.At present,the domestic and foreign specifications only consider the influence of the hole on the strength of the component,but ignore its influence on the compression stability capacity.The finite element software ANSYS was used to numerically analyze the single angle component with circular holes,and the influence of slenderness ratio,opening size,number and location on the ultimate capacity of axial compression was discussed.The analysis results show that the influence of opening on the compression stability capacity of components can not be ignored,and its influence degree is related to the slenderness ratio and opening arrangement.The larger the slenderness ratio is,the lower the influence of opening on the capacity of components.The larger the opening is and the more the number is,the lower the capacity of components.The closer the opening is to the steel limb tip and the farther it is from the joint,the lower the capacity of the components.