In order to research the transfer characteristics of vehicle-equipment coupling system dynamical force, the vehicle-equipment coupling system has been established, and the acceleration frequency response function have been obtained. Also, the transfer ratio integral sum between car body and the single, double hanging system have been calculated respectively. The influence of suspending frequencies, position, and mass ratio on the transfer characteristics has been researched. The result shows that: the single hanging system has bigger transfer ratio, and been easier effected by speed than the double hanging system. The single system transfer ratio was high when the hanging frequency was 7-10.5Hz. In the double hanging system, increased the frame hanging frequency, the transfer ratio increased; increased the equipment 2 hanging frequency, the transfer ratio decreased. In order to avoid occurring high transfer ratio, the single hanging system should be suspended far away from the middle vehicle. When the longitudinal suspending position of equipment 1 was less than 6.5m, the single system can obtain good transfer characteristic. And the double system suspending position had little influence on the transfer ratio. The mass ratio of double hanging system had big effect on the transfer ratio from frame to car body, and the bigger frame mass, the smaller force transfer to the frame.
