Regarding the problems existing in the pipe sheet combination design for automated wharfs，such as multiple foundation intersections，difficulty in modeling pile foundation，changes in pile length with geological changes，lack of model attribute fields，and difficulty in pile foundation coding，a 3D design and extended application of steel sheet pile combination based on BIM Technology is carried out. We use the method of collaborative design and the method of secondary development of modular programming tools in the software to achieve some functions，such as conflict checking of pile foundations，batch creation of models，real-time correction of pile lengths，external drive addition of pile foundation properties，and classification supplement of pile foundations base coding，etc. In this way，the intersection between foundations and design errors can be reduced，the efficiency of 3D design and the use value of 3D models can be improved，and the application of BIM technology in the combined design of automated wharf pipe sheets is more valuable.