Abstract: Conventional seismic devices for railway bridges in high-intensity seismic zones often suffer from limited energy-dissipation capacity and inadequate durability. To address these shortcomings, this study proposes a novel energy-dissipation based on corrugated steel tubes. Using a long-span continuous beam bridge of a high-speed railway as a case study, the mechanical behavior of the proposed device was first investigated through finite element analysis using ABAQUS. Subsequently, a full-bridge model was developed to compare the seismic performance and damping effectiveness of three configurations: viscous dampers, seismic shear keys, and corrugated steel tube device. Results indicate that the corrugated steel tube device exhibits full hysteretic loops and maintains stable energy-dissipation and displacement-restraining performance even under large deformations. Full-bridge analysis further confirms its favorable seismic mitigation capability. Moreover, under identical yield strength conditions, the unit cost of the corrugated steel tube device is approximately 25% of that of viscous dampers and 60% of that of seismic pins, highlighting its significant economic advantages and practical engineering potential.