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The transverse random vibration of a high-speed train is composed of three degrees of freedom of motion, roll and shake vibration, which is the key to the lateral stability of the train.In order to improve the train lateral running stability, improve the semi-active control performance.In this paper, a dynamic model of a high-speed train is established to analyze the lateral vibration characteristics of the vehicle body, and it is concluded that the aggravation of the lateral vibration is the main reason for the deterioration of the composite lateral vibration and lateral stability of the vehicle body.Based on the analysis of the control effect of the vehicle body composite transverse vibration and the transverse vibration of the vehicle body as feedback under the traditional ceiling damping control algorithm, it is concluded that the traditional ceiling damping control algorithm with the transverse vibration of the vehicle body as feedback has better suppression effect on the vehicle body transverse vibration.On this basis, a virtual composite damped ceiling control algorithm based on the feedback of vehicle body transverse vibration is proposed, and a joint simulation analysis is carried out.Results show that compared with the passive control, adopt virtual composite damping ceiling control algorithm is proposed in this paper, the synthesis of lateral vibration acceleration peak value of the body, root mean square value and the stability period reached 46%, 43% and 19.5%, respectively, were higher than the traditional ceiling damping control algorithm, is adopted in this paper, the virtual composite damping ceiling synthesis transverse vibration control algorithm in the inhibition of car body, improve body lateral stability has better control performance.