Aiming at the high cost of the bulkhead structure with inclined support pile and sheet pipe pile platform,combined with the practical application of the Yangshan Port area,the optimization design is studied.Using the same design calculation model as the existing structure,the use conditions and mechanical characteristics of the structure are compared and analyzed.The conclusion is drawn that the application of similar structures in large container terminals on soft soil can significantly optimize the structure.A new type of semi-vertical bulkhead structure,namely inclined top support sheet pile structure,has been formed by staging construction rock mound behind the wall,canceling the back supporting pile,using the composite sheet pile of steel pipe and steel plate optimize the closely steel sheet pile structure,optimizing the big platform as a small guide beam.The results show that the independent stable structure system composed of inclined top support sheet pile and the lower rock mound can better adapt to the earlier deformation characteristics of high fill in soft soil foundation and the use requirements of superstructure in the later period.The new structure makes more rational use of the bearing capacity of pile foundation structure and is more economical.It is conducive to the popularization of similar projects in soft foundation area.