To investigate the impact of motorcade loads on the dynamic responses of the floating bridge, this paper establishes the numerical model of the hinged floating bridge based on the Kane method. The accuracy and rationality of the proposed method are validated by comparing the numerical results with those in the related literature. Furthermore, the numerical model for the elastic hinged floating bridge is developed, and the influence of hinge stiffness on the dynamic responses of the floating bridge is analyzed. Subsequently, the case of motorcade loads passing through the floating bridge is considered, and the impact of load distance on the dynamic responses of the floating bridge is investigated. The study reveals that increasing the hinge stiffness can improve the smoothness of the load traveling through the floating bridge, but it also leads to an increase in the bending moments of the connector. The superposition effect of the loads can be utilized to prevent excessive forces on the floating bridge connectors by choosing an appropriate load distance.