Abstract: Aiming at the low frequency lateral shaking of the train body during the running of high-speed trains, the effect of the inertial vessel on the low frequency vibration of rail vehicles was studied.Firstly, a coupling model of high-speed train and track was established to study the dynamics of inertial container vehicles under different frequency states, such as wheelset lateral movement, lateral acceleration and power spectral density. The result is that, due to the gradual increase of frequency, the effect of the inertial vessel on the suppression of low frequency vibration is obviously better than that of high frequency. For low-frequency excitation at 1 Hz, the decrease rate of power spectral density is 11%, while for 5 Hz and 10 Hz, the corresponding decrease rate is 5.5% and 1.1% respectively.