Auxiliary measuring ruler for measuring straightness of pipeline

The utility model provides an auxiliary measuring ruler for measuring the straightness of a pipeline, which comprises a main body structure, the main body structure comprises two connecting arms and a measuring ruler, one ends of the two connecting arms are fixedly connected together, the two connecting arms are perpendicular to each other, each connecting arm is provided with a plurality of mounting holes at equal intervals, and the measuring ruler is arranged on the main body structure. Threaded holes are formed in the two ends of the measuring scale, the measuring scale is installed between the two connecting arms, and bolts are jointly installed in the threaded holes and the installation holes in the corresponding positions. Wherein one connecting arm is tied with a plumb line, and one end of the plumb line far away from the connecting arm is fixedly provided with a plumb. Compared with a traditional auxiliary measuring ruler for measuring pipelines, the auxiliary measuring ruler for measuring the straigh