Vibration reduction and noise reduction. Long-span railway bridges are structures built for railways to cross rivers, lakes, straits, valleys or other obstacles, and to achieve three-dimensional intersections between railway lines and railway lines or roads. The structure adopts a ballasted bridge deck to reduce vibration and noise. The structure is safe and stable, and has strong maintainability. The ballasted bridge deck mainly uses a concrete trough structure to accommodate the ballast, and is connected to the reinforced concrete or prestressed concrete trough beams through shear keys.