Energy-absorbing and anti-overriding damping units are composed of resilient dampers and deformation energy-absorbers. The unit is able to restore to its original after encountering a force within its safety limit by the working of resilient dampers. When the crash energy exceeds the specified value of safety limit, crushing chains will abosrb energy by deforming itself to ensure the safety of passengers and the vehicle. Such units are applied widely on low floor vehicles designed for light rail train, as weel as other railway vehicles.