Abstract: In order to study the most suitable simulation method and the optimal staged tension scheme for internally prestressed cable structures during the construction tensioning process, a swimming pool was taken as an example and three methods of applying prestressing force, namely the equivalent load method, the initial tension input method and the equivalent cooling method, were used to carry out the simulation analysis of the four tensioning stages of the structure, and the transverse displacement values of the structure were compared with the measured data in order to determine the most suitable simulation method. The most suitable simulation method was then used to study the effect of staged tension on the deformation and force of the structure, and to determine the optimal staged tension scheme. The analysis results show that the simulation analysis of internally prestressed cable structures needs to apply the prestressing force as an internal force. The maximum stress value generated in the tensioning process is much larger than the stress value in the final formed state. An increased number of tensioning stages yields a better final structural configuration and lower maximum stress in the structure during the tensioning process. In practical construction process, the structural stress has not yet reached the yield strength, and reducing the number of tensioning stages is more efficient and economical. A three-stage tensioning program for this roof structure can achieve a better tensioning effect, and the maximum stress value of the structure in the tensioning process is lower than the design stress of the member. This study can provide a reference for the selection of simulation methods during the tensioning stage and staged tension schemes for similar structures.