Side doorsill mounting structure for railway vehicle

The utility model relates to a side doorsill mounting structure for a railway vehicle. The side doorsill mounting structure comprises a side doorsill body, wherein the lower end surface of the upper plane of the side doorsill body is welded with stiffening angle iron, a welding hole is formed in an outer upright plate of the side doorsill body lengthways, fixed angle iron is welded on the upper end surface of a chassis edge beam corresponding to the side doorsill body, the outer upright plate is connected with the outer vertical surface of the fixed angle iron in a plug-welding manner, a base plate is arranged under an inner upright plate of the side doorsill body, the base plate is respectively and fixedly connected with a corrugated floor and the inner upright plate in a welding manner, and the two ends of a doorsill are fixedly welded with a side doorframe. As the lower end surface of the upper plane is welded with the stiffening angle iron, and the outer vertical surface of the doorsill is fixed by the fi