This paper presents the structure of front sheet pile wall with rear piled platform, which can be used for narrow land area, large cantilever and silt foundation with serious liquefaction conditions. The main features of the structure are as follows: The front sheet pile wall is steel tube type combined steel sheet pile; The rear part is piled platform with PHC fork pile anchorage; The poling board is set at the back of the piled platform; The drainage hole is set in the steel sheet pile around the extreme low water level; The silt foundation is treated by vibration shock process under water.