Abstract: In order to study the impact of Yingmentan-Matan Section on Lanzhou rail transit Line 1 on the Yellow River Bridge where the shield tunnel construction crosses under the bridge pile foundation, the finite element calculation method is used to simulate the shield tunnel construction underneath the Yellow River，and the impacts of construction are analyzed from aspects of ground settlement，bridge pile foundation displacement and internal force changes. The simulated results coincide with the practical conditions，showing that the simulation method could quantitatively predict the impact of shield tunnel construction on the pile foundation of existing bridges.