Abstract: Large difference exists in stress characteristics of the transitional segment of offshore composite bucket foundation and regular prestressed structures,and corresponding adjustment for the tensioning method is needed.In this paper,a tensioning method of four tendons being strained synchronously is proposed,and numerical simulations on common tensioning schemes are conducted by ABAQUS.Comparative analyses on structural responses and stress distribution are performed among different tensioning schemes,band the optimal scheme is concluded by multi-evaluation.The results obtained herein have instructive function for prestress tensioning in similar structures.