Tool for measuring depth of scratch on surface of pipe

The utility model relates to the technical field of nondestructive testing, in particular to a tool for measuring the depth of a scratch on the surface of a pipe. The pipe surface scratch depth measuring tool mainly comprises a scratch depth measuring instrument, a bracket and a fixing assembly, a mounting groove is formed in the bracket, part of the scratch depth measuring instrument is mounted in the mounting groove, and protruding parts are arranged on the two opposite sides of the bracket in a protruding mode. The number of the fixing assemblies is at least two, and each protruding part is detachably connected with at least one fixing assembly so that the positions of the fixing assemblies can be adjusted relative to the protruding parts in the first direction. The at least two fixing assemblies can clamp a to-be-tested sample, and the scratch depth measuring instrument can be tangent to the surface of the to-be-tested sample. Through the arrangement of the scratch depth measuring instrument and the fixin