Double-line shield tunnel passing under communication tower poses big risk. The research of shield construction influence on displacement of tower is of great significance to guarantee the stability of the tower during construction. Based on the construction of Tianjin Line 6 double-line shield tunnels, traversing the communication tower, the finite element numerical analysis software ABAQUS is employed to simulate the shield construction process. The calculated values and measured values of ground settlement are compared and analyzed to verify the rationality of the shield simulation. Researches are conducted on the displacement change of the tower when the metro double-line shield tunnels are excavated below the communication tower at different positions, and displacement distribution pattern of the tower at each position is identified. At the same time, the area in which the tower is affected seriously is analyzed. The results show that in the process of tunneling on the left line, the tower is affected most within the range of 2 times of the tunnel diameter from the tunnel axis;in the process of tunneling on the right line, the tower is affected most within the range from 2 times of hole diameter of the left tunnel to the 2 times of hole diameter of the right tunnel.%地铁双线隧道盾构下穿通信铁塔，风险程度较高。研究盾构近接施工对铁塔位移的影响，对于保证施工中铁塔稳定具有重要意义。以天津地铁6号线盾构隧道下穿通信铁塔为例，通过有限元数值分析软件ABAQUS对盾构施工过程进行模拟。将地表沉降计算值与地表实测值进行对比，验证盾构模拟的合理性。对地铁双线隧道不同位置处下穿通信铁塔时铁塔位移变化进行研究，得到各位置处铁塔位移分布规律。同时分析铁塔受影响较大区域，结果表明在左线隧道开挖过程中，距隧道中心2倍洞径范围内铁塔受影响程度最大；右线隧道开挖过程中，左线隧道左侧2倍洞径至右线隧道右侧2倍洞径范围内铁塔受影响程度最大。
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