The utility model relates to a track fastener elastic strip and belongs to the technical field of engineering original parts and parts. On the elastic strip, a surface contacted with a loosening nut, a surface contacted with a track gauge block and a surface contacted with a track gauge baffle are all provided with convex teeth without weakening the section area of the elastic strip. The convex teeth are cylinders with the section diameter of 2.4-2.6mm and the height of 0.8-1.2mm; the differences between the circle circles of the convex teeth are 2.5-3.5mm. The area defined by a connecting line between the convex teeth and the circle center at the outermost layer is not smaller than the area of the contacting surface. The convex teeth and the elastic strip are integrally molded and are made of the same material. The service life of the fastener elastic strip is prolonged by about 15-20% due to the structural improvement, and the track transportation cost and the curing cost are reduced.