Distance marking device for tensile sample

The utility model relates to the technical field of material mechanical property testing, in particular to a scale distance device of a tensile sample, which comprises a support, a scale and a marking pen, the scale and the marking pen are arranged on the support, the support is frame-shaped, a groove strip is fixed on the surface of one inner side edge of the support, and a plurality of parallel grooves are arranged on the groove strip; the scale is square, a protrusion is arranged on the front side of the scale, and the protrusion is matched with the groove; a guide rail is arranged on the support, a first sliding block is arranged on the guide rail in a sliding mode, the sliding direction of the first sliding block is parallel to the left side edge or the right side edge of the scaleplate, a clamping mechanism is arranged on the support, and the clamping direction of the clamping mechanism is perpendicular to the left side edge or the right side edge of the scaleplate. The gauge length marking device is si