【Objective】Studying the issue of excessive vibration in high-rise buildings located in the test track area of subway depots.【Method】Through on-site measurement and finite element simulation of the environmental vibration before and after the vibration reduction transformation of a subway vehicle testing line, the vibration source and the vibration transmission law of the upper cover before and after the vibration reduction transformation are analyzed.【Result】The results indicate that the influence of vehicle speed on the dominant frequency of the source intensity affects the level of vibration transmitted to various floor slabs. The vibration measured in bedrooms is relatively large under the condition of 60km/h, while the vibration in living rooms is more significant under the condition of 40km/h. The vibration first decreases, then increases, and finally decreases again as the distance from the vibration source increases. While the steel spring floating slab reduces vibration, noise may be slightly amplified, with all vibration measurement points at the vibration source reduced by more than 10dB after the modification, but the noise at the 7.5m measurement point increased by 0.96dB. By comparing and observing the changes in vibration levels at different frequencies with floor height before and after the vibration reduction modification, it is found that the maximum frequency band of vibration acceleration level shifts forward, from 25-40Hz before the modification to 20-25Hz after, which is related to the change in excitation frequency at the vibration source.【Conclusion】Compared to conventional ballast beds, the steel spring floating slab after vibration reduction modification can significantly reduce vibrations, enabling the buildings constructed above the test track area of this depot to meet the corresponding regulatory requirements.