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This invention discloses a finite element analysis method and system for the yield buckling strength of a marine integrated test platform. The method includes establishing a finite element model of the platform for marine integrated testing; obtaining the peak value of the wave load transfer function based on the design wave method and the hydrodynamic calculation results of the hydrodynamic model, selecting design wave parameters, and applying the corresponding wave loads to the entire platform finite element model; solving the structural finite element model to obtain the calculated results of nodal stresses and nodal displacements; and analyzing the calculated results of the nodal stresses and nodal displacements to generate a stress contour map. This invention enables the structure to withstand environmental loads within its design service life and meets the strength requirements under design conditions.