Abstract: Railway construction has been developed rapidly. But during the construction of a new subway, the tunnel will inevitably pass through the foundation of buildings. How to control the risk of underpinning construction and protect existing buildings becomes an inevitable challenge. The paper focuses on the management and technology used in Viaduct Pile foundation underpinning, elaborates the design, construction technology and safety monitoring work. The provided valuable experience of bridge pile foundation underpinning construction in complex environments and geological conditions is helpful to security risk management.