Positioning scale

The utility model relates to the technical field of detection measuring tools, in particular to a positioning scale. Comprising a reference positioning plate, a main ruler, a first positioning ruler and a second positioning ruler, the reference positioning plate is connected with the main ruler, and the first positioning ruler and the second positioning ruler are arranged on the main ruler; the reference positioning plate comprises a first positioning surface and a second positioning surface; the first positioning surface is used for calibrating a first reference position of a reference object, and the second positioning surface is used for calibrating a second reference position of the reference object; the first positioning ruler is used for measuring a first to-be-determined position of a to-be-determined object; and the second positioning ruler is used for measuring a second to-be-determined position of the to-be-determined object. In the construction process, under the condition that the reference positi