Very large floating structures (VLFS) are substantial in scale, typically comprising dozens to hundreds of interconnected modules. This paper utilizes a multi-float towing approach to enhance transport efficiency. A numerical model of multi-float system, based on potential flow theory and multi-body hydrodynamic interaction, is developed and validated. The dynamic responses for six towing configurations under various wave periods and environmental load directions are investigated by using this model. In addition, a selection method is proposed to determine the optimal towing configuration that meets the towing stability criteria while maximizing efficiency, cost-effectiveness, and minimizing environmental impact. Results indicate that during towing multi-float systems, the rear module's vertical motion caused by the combination of heave and pitch is significantly greater than that of the front module, especially in long wave periods. When the number of longitudinal tandem modules reaches four, the low-frequency motion modes with sway and yaw as the main motions are excited, leading to a significant lateral displacement and horizontal rotation of the multi-float system. This also results in uneven tensions of the symmetrical cables. Additionally, the dynamic behaviors of the towing configurations are more pronounced in oblique or lateral waves than in forward waves. As the current direction shifts from forward to lateral, the sway amplitude of the system with four longitudinal tandem modules decreases. Furthermore, an optimal towing configuration is determined by the selection method, which has good stability in moderate sea conditions. The findings of this paper provide valuable insights for towing multi-float systems and have implications for future VLFS construction.