In order to study the acceleration of the vibration source system from the Fuzhou Metro and to analyze the propagation law and attenuation characteristics of the soil along the metro lines, the vehicle track vertical coupled model of vibration is established. Based on the parameters of the Fuzhou Metro, all parts of the system′s vertical accelerations are counted under a certain speed, and the effect of speed alteration is analyzed. The analysis results show that: the carriages vibrate with their natural frequency; some areas of dominant frequency concentration exist from the bogie, wheelset, supporting block and track bed; and the second peaks are caused by high-frequency contact between the wheelset and supporting blocks. Track fasteners and rubber bearings can improve anti-vibration capability, and vertical acceleration increases with subway speed, while damping effects tend to stabilize.