As a multi-axially symmetrical steel structure，steel pipe piles have stable performance and a relatively clear stress mechanisms. They are widely used in port engineering in China and foreign countries and are mainly used for the foundation structure of high-pile wharf and the main structure of sheet pile wharf. This article compares the calculation methods of the internal force of steel pipe piles in four domestic and foreign codes （Chinese standards，European standards，API，and AISC），to explores the differences among the four standard calculation methods，which provides a reference for the selection of internal force calculation methods of steel pipe piles in overseas projects. Finally，taking the high pile pier and abutment structure of a port as an example，the internal force of the steel pipe piles calculated by the four codes is compared. The results show that：1）The AISC code calculation result is the smallest，that is，it fully considers the performance of the structure. The result is safe. 2）The European standard calculation result is the largest and relatively conservative. 3）The calculation results of Chinese code and API standard are between AISC standard and European standard.