During the construction of the section from Yongjiang Road Station to Jinjiang Station of Hangzhou Metro Line 4, a wide range of liquidiable strata should be traversed. In order to reduce the potential risk of the tunnel destruction which could be caused by tunnel floating when earthquake acts, the buried depth of the tunnel was increased, so that part of the tunnel was located in the non-liquified soil layer. In order to study the influence of the local liquefaction formation range and burial depth on the seismic floating displacement of tunnel, and to evaluate the earthquake-resistance effect of the tunnel after adjustment, the finite difference software FLAC^3D numerical simulation and shaking table test were combined to carry out numerical analysis and model tests on the seismic uplift of tunnels in different liquefied soil layers and different buried depths. The results are as follows:the smaller the range of liquefied stratum is, the smaller the floating displacement is. When the tunnel is buried to 14 meters deep and the liquefaction ground layer of the tunnel is less than half of the tunnel area, the tunnel only slightly floats; Tunnels should avoid being completely in liquidiable formations, the seismic safety of the tunnel structure can be improved by combining the liquefied and non-liquefied stratum or increasing the buried depth.