The floating regasification unit （FRU）of liquefied natural gas （LNG）adopts a mooring method with steel pipe piles and hoops to restrict its horizontal displacement and sustain waving force. The steel pipe piles are socketed into the seabed. This pile type is characterized by a thick pipe shaft，a great rock-socketed depth，a large diameter and hard construction. According to comparison and study on special programs，we propose the construction technology including building offshore construction platforms，enlarging piling holes，inserting integral steel pipe piles，presetting holes at the lower part of the steel pipes and casting underwater concrete. The technology helps well solve the problem regarding the integrity of concrete inside and outside the socketed pile and ensures the quality of the structure. It may serve as reference for similar projects.