Contact rail measuring scale

The invention relates to the field of contact rail measurement, in particular to a contact rail measuring scale, which comprises a scale body, one end of the scale body is provided with a measuring device, the measuring device comprises a force measuring adjusting part, a fixed guide rail and a measuring base (a horizontal dimension measuring surface and a vertical dimension measuring surface), and the two measuring surfaces are vertical and L-shaped. And positioning insulating support blocks are arranged below the middle part of the ruler body and below one end far away from the measuring device. And a digital display reading device and a measuring handle book are sequentially arranged above the middle part of the ruler body. Through structural optimization of the one-key measurement handle, the measurement device, the simple zero setting device, the digital display reading device, the magnetic adsorption device and the ruler body, the uncertainty of measurement results introduced by human and external facto