Abstract: Based on the shield tunnel project between Lvcuo Station and City Square Station in Xiamen urban rail transit, the surface deformation caused by shield tunneling in typical weathered granite strata is studied by using the field monitoring data analysis and the numerical simulation method, the transverse and longitudinal deformation laws of the surface are analyzed. The results show that the main lateral influence range of shield tunneling in Xiamen metro is approximately 20 m on both sides of the two tunnel axis, and the width parameter of the settlement trough is around 0.55 m. The influence range of longitudinal surface deformation is approximately 5~10 m in front of the shield cutter, and 20~30 m behind the shield tail. In addition, the mean surface settlement caused by shield tunneling in typical weathered granite strata is about -15.0 mm, and the formation loss rate is about 1.0%.