Aiming at the control problem of low-frequency vibration from railway traffic, in which the effectiveness is poor, a theoretically designed innovative countermeasure, named excitation transmission pile system (ETPS), is presented to reduce low -frequency vibration. The mechanism and structure of ETPS are introduced, and its effects are investigated by finite element simulation using the parameters of Bell Tower section of Xi′an metro line 2. The results demonstrate that the ETPS has good performance for vibration isolation. Vibration speed and acceleration of the ground above tunnel obviously are reduced by increasing the pile length of ETPS. When the train speed bellows 22.22m/s, the speed change has little effect on the vibration isolation performance of ETPS. When it exceeds 22.22m/s, the greater the train speed, the longer the pile length of ETPS should be for satisfy the vibration limits, because the vibration speed and acceleration of the ground above tunnel increase with the train speed increasing.