The utility model discloses a rail guard of contractible brachymedial zonation distance, including the concrete base, be equipped with guardrail seat buried sleeve in the concrete base, be equipped with the matched with stand in the guardrail seat buried sleeve, evenly be equipped with a plurality of matched with crossbeams on the stand, the both ends of crossbeam are equipped with crossbeam concatenation sleeve pipe, through connecting piece fixed connection between the crossbeam concatenation sleeve pipe, the stand outside still is equipped with warns the layer, and also be equipped with matched with elastic element on the connecting piece. The beneficial effect of the utility model: the utility model discloses can keep effectively reducing the bridge construction cost under the unchangeable prerequisite of road service function, reduce the city land use, economic benefits is showing, it is thus clear that it when satisfying safety protection, has reached the comprehensive function that economic nature is good, the view is harmonious, the operation maintenance is convenient, has good development prospect.