Aimed at the connection issues of modular platforms equipped with photovoltaics, a new concept model of flexible connector is introduced. Based on the structure of the new flexible connectors, the weight factors are assigned to each external spring. This achieves precise adjustment of the directional stiffness of the connectors through additional stiffness. The simulation integrates the dynamic model of the floating platform, connector model, and marine environment model. The time-history response of the first module unit and the peak load on the main shaft of the connector are obtained by adjusting various additional stiffness. The results indicate that: high additional stiffness can reduce the shear limit load of the main shaft of the connector, but it will increase the tensile and compressive limit loads of the main shaft; when the additional stiffness is 105 N/m, the sway amplitude of the module platform decreases by an average of 67% compared to that without additional stiffness, and the sway amplitude of the module platform units decreases significantly.