The invention provides rail vehicle and a head-car barrier removal piece thereof; the head-car barrier removal piece is arranged in a flow guide plate of a head-car barrier removal device, and comprises a front rack connected with a front inner surface of the flow guide plate, and vertical beams connected with two ends of the front rack; two sides of the front rack are provided with side edges leaning outwards from front to back; the side edge is connected with the vertical beam on the same side through a connector; the connector deviates and vertically extends; when vertical shock loading is overlarge and the connector is cut off, the front rack will move backwards along the vertical beams through the two side edges. When barriers are removed or train clash happens, if impact force exceeds the maximum load value of the barrier removal piece, the connector will be cut off by received overlarge shearing force, the front rack will move backwards along the vertical beams through the two side edges, thus releasing space for an energy-absorbing part arranged in front end of the head-car, so the energy-absorbing part can effectively absorb the impact energy, vehicle passive security can be improved, and creeping or derailing accidents can be prevented.