Abstract: According to Design Specification of Concrete Structure(GB 50010-2002) and actual testing data on cracking resistance and ultimate bending moment of 95 pretensioned spun concrete piles collected by the authors, two revised suggestions are offered for calculation of cracking resistance and ultimate bending moment of pretensioned spun concrete piles through research and analysis, which makes the calculation results be basically in accord with the actual conditions of spun concrete piles-producing factories in China.