Research purposes: Improving the seismic performance of shield tunnel is to meet the certain demands of ensuring the safe operation of tunnel and safeguarding the people＇s lives and properties． Changing the properties of the rock in a certain range of the lining and changing the structure performance are two main ideas on improving the seismic －resistant and absorption properties of the shield tunnel． There are many ways for changing the lining structure，such as increasing the lining thickness，changing the way of segment loop joint or vertical joint and changing the lining rigidity．In this paper，the numerical analysis and comparison of the impact of the different lining rigidities on the seismic －resistant and absorption properties of the shield tunnel for providing the reference to the design of seismic － resistant and absorption．
Research conclusions: From the analysis of loading bearing of the different lining rigidities of the shield tunnel，it is concluded that only increasing the rigidity of the segment alone can not improve the seismic performance of shield tunnel，but increases the load on the segment． With the increase of the rigidity of the tunnel lining，the displacement of the lining structure is reduced by less than 2 mm，thus it is not obvious to restrain the deformation of the shield tunnel by increasing the lining rigidity under the effect of earthquake．
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