Based on the design of the restraining rock socketed pile of floating regasification unit，we provide an insight into various horizontal layered concrete-filled steel tube composite section parameters and stiffness calculation，introduce the recognized 〖WTB1X〗P-Y〖WTBZ〗 curves for the cyclic load type and rock，and establish simulation models for the P-Y curve using software ANSYS. Furthermore，we probe into the effects of the ground model，P-Y curves for the static and cyclic load type，rock socketed depth，lateral force application level，and uniaxial compressive strength of rock on the internal force of restraining rock socketed pile. The research results may serve as a reference basis for the design and execution of the restraining rock socketed pile of floating regasification unit.