Abstract: Caofeidian coal storage and distribution of digital base project construction site is formed by land reclamation,the upper part is weak and has a moderate layer of liquefied land reclamation,and the proposed structure of the foundation of strength and deformation are demanding,the foundation bearing capacity required to achieve 320 kPa,deformation control demanding.Stratigraphy and structures for such characteristics,the design made using rigid-flexible piles composite foundation program,combining the advantages of both method,the flexible pile reinforced soil between piles effectively,eliminated negative friction resistance and liquefaction;rather rigid pile provided a substantial increase in bearing capacity and sedimentation control.This paper describes the design concept of the rigid-flexible piles composite foundation,the calculation patterns of bearing capacity and settlement,through specific examples of projects,introduce design program and experimental construction,described the advantages and applications of the method.Practice has proved that the rigid-flexible piles composite foundation has good economic and social benefits,similar projects in similar areas worthy of large-scale application.