Aiming at the current status quo that the domestic design method of steel tie rods is lack of recognition in overseas applications,we introduce in detail the calculation theory,method and process of steel tie rods body and components (connecting plates,pins) in European codes,meanwhile carry out design and calculation with examples.The results show that the tensile resistance of the steel tie rod body is controlled by the minimum value of tensile resistance between shaft and threads.In the design,some measures can be taken to avoid bending moments occurring in the rod such as one-way hinges,at which time the notch coefficient can be taken as the value of 0.9,and the threaded section's tensile resistance can increase by 50%.The diameter of pin should be determined to satisfy the requirements of the bending resistance,bearing resistance,shear resistance and combined shear and bending resistance. The diameter of pin can be slightly increased as the size of the plate openings when the size of connecting plate is designed.