Pipeline laying auxiliary device

The pipeline laying auxiliary device comprises a base, a supporting rod and a backup plate, the base is placed on the bottom face of a groove, the lower end of the obliquely-arranged backup plate is rotationally connected to the side, close to a pipeline, of the base, and the backup plate obliquely abuts against the lower portion of the side face of the pipeline; a screw rod and two movable rods arranged in an X shape are arranged in a cavity in the base, a positive thread and a negative thread are symmetrically arranged on the screw rod horizontally and rotationally installed in the cavity, corresponding movable blocks are arranged on the positive thread and the negative thread in a threaded and sleeving mode respectively, and the movable blocks abut against the side walls of the grooves through the two movable rods; a crank is detachably mounted above the base, the crank is connected with the screw rod through a rotating assembly, and the crank vertically extends out of the groove upwards; the supporting ro