For marine semi-submersible equipment, based on the AQWA platform, the intelligent optimization design of key hydrodynamic parameters is realized by integrating Matlab algorithm development and data interaction module. The general complex kinematic pair model is constructed by the equivalent model to realize the modeling and hydrodynamic calculation of complex relative motion mechanism. Through the secondary development of the data interface, the full coupling simulation calculation of multidisciplinary and multidisciplinary fields is realized.