Abstract: The correlation among metro shield construction parameters affects ground deformation to various degrees. Taking the composite interacting stratum of a shield interval of Tianjin Metro as research object, the correlation among shield construction parameters is analyzed using SAS software. GRA (grey relation analysis) is employed to calculate the correlation coefficient of shield construction parameters that cause ground deformation, and the results are compared with the actual land subsidence for verification. The results show that the correlation between the earth chamber pressure and the jack thrust is the highest, the coefficient of which reaches 0.872; from silty clay stratum to composite interacting stratum, the average jack thrust increases by 63.1%; the field measured correlation coefficient of ground deformation is close to the GRA coefficient. The adjustment of metro shield construction parameters can reduce the influence of construction on ground deformation.