Abstract: Objective: As one of the large underground structure projects, tunnel engineering faces a significant liquefaction damage risk when crossing liquefiable stratum. Targeting this issue, it is necessary to analyze the influence of drainage pile reinforcement and dynamics load intensity on dynamics response of shield tunnelling in liquefiable stratum.Method: A numerical analysis model of liquefaction dynamics response in liquefiable stratum is established, and the effectiveness of the model is validated through an actual engineering case. Based on Shanghai Rail Transit Chongming Line project, the model is applied to analyze the dynamics response of liquefaction site reinforcement, evaluate the effect and scope of drainage pile reinforcement measures for liquefaction site, and analyze the dynamics response of tunnel crossing liquefiable stratum under different dynamics load intensities.Result & Conclusion: The UBC3DPLM constitutive model in Plaxis2D software can effectively simulate the pore pressure dynamics response in liquefiable stratum. The drainage piles on both sides of the tunnel can effectively suppress the liquefaction in liquefiable soil stratum within a certain range for under dynamics load action. The dynamics load intensity mainly affects the accumulation and growth pattern of excess pore pressure. When dynamics load peak acceleration reaches 0.2 g (where g is the gravitational acceleration), the excess pore pressure accumulation growth pattern of liquefiable stratum is basically consistent, arriving at complete liquefaction at the initial vibration stage, and the excess pore pressure tends to stabilize with the increase of vibration load action time.