To reduce the vibration of car body and protect carbody underframe suspended equipment, the coupling vibration relationship between carbody and carbody underframe suspension equipment was studied to improve vehicle dynamic performance. Considering the elastic vibration of the vehicle body, rigid and flexible coupling dynamics model of the carbody and carbody underframe suspension equipment was established. The influence of the passive control scheme and the semi-active control scheme based on the ceiling damping on vehicle vibration was analyzed and compared. The importance of reasonable parameter matching was analyzed. In addition, taking the quality of suspension equipment as an example, the effect of semi-active control was discussed. The results showed that: the semi-active control scheme could reduce the elastic vibration of the car body under the reasonable parameter matching; when the weight of suspension equipment was larger, semi-active control scheme was better than passive control. Within a certain range, the damping effect was more obvious with the increasing in weight.