Abstract: Surveys reveal that various damages often occur tomany railway tunnelswhich are constructed in landslides, thus the normal operations of railways are influenced. A finite element method for contact problems is developed to study the interaction mechanism between landslides and tunnels and to analyze the deformation of the tunnels in landslides. The paper begins with a brief introduction to the fundamentals of this computational method, followed by the numerical simulation of an engineering example in which the method is employed to compute the deformation of the tunnels in landslides. The results obtained are useful for understanding the behaviors of the tunnels in landslides and are helpful for the prevention or treatment of the hazards of tunnels.