For the fatigue design of large-diameter steel tubular restraining piles for floating regasification units，studies are conducted on relevant codes of British Standard，Bureau Veritas，ASTM，and Det Norske Veritas. Details of fatigue analysis theory，analysis flow，and design section zoning are discussed.S-N curve methodology is adopted to calculate the linear cumulative damage of restraining piles under weld class C and D，respectively. The results show that concrete filling，increasing pile wall thickness and weld class can improve the fatigue resistance of the restraining pile. The research results can provide a reference basis for the fatigue design of steel tubular piles.