The invention relates to a sand wind preventing pedal of a railway vehicle. The pedal comprises a case type box composed of an enclosure plate and a sealing plate, a pedal body is arranged in the enclosure plate in a welded mode, a frame is fixed to the upper edge of the enclosure plate, an L-shaped connecting iron part welded to the enclosure plate is arranged below the frame and fixedly welded to an iron floor, the side, close to an end beam, of the enclosure plate is fixedly welded to the end beam, the side, away from the end beam, of the enclosure plate is fixedly welded to an edge beam, a turnover plate is connected to the position above the enclosure plate through a hinge, a doorsill is welded to the front end of the turnover plate, an L-shaped groove is formed in the inner side of the doorsill, and the two groove walls of the L-shaped groove are suitable for abutting against a sealing rubber strip on a lower opening of a side door of the vehicle. According to the sand wind preventing pedal of the railway vehicle, the section form of the doorsill is optimized, contact with the side door is improved, and a good sealing effect is achieved; due to the fact that the enclosure plate and the pedal body are of an integrated case type structure, the side outline of the enclosure plate is consistent with the structure of a vehicle body, and the rigidity of the pedal is obviously improved.