This paper analyzes the advantages and disadvantages of the traditional structure of front sheet pile and high pile caps.Aiming at the durability and economy of concrete sheet pile and steel sheet pile,an improved scheme is put forward,which is a composite structure of front sheet pile and high pile caps.The calculation model of composite structure is established by using the method of vertical elastic foundation beam,and the optimization method of concrete pile force under internal force calculation using finite element software SAP2000 is explained.A wharf in Shanghai is taken as an example to verify the practicability and accuracy of model calculation of composite structure of front sheet pile and high pile caps.