Small-diameter pipeline assembly tool

The small-diameter pipeline assembly tool comprises a lower arc plate, the right side of the lower arc plate is movably connected with an upper arc plate through a hinge shaft, a connecting plate is integrally formed on the left side of the lower arc plate and the left side of the upper arc plate, and small-diameter pipelines are sequentially inserted into inner cavities of the lower arc plate and the upper arc plate from front to back; the connecting plate is provided with a fixing structure used in cooperation with the lower arc plate and the upper arc plate, and the periphery of the lower arc plate and the periphery of the upper arc plate are each provided with a limiting structure used in cooperation with a small-caliber pipeline. By arranging the fixing structure, the connecting plates on the lower arc plate and the upper arc plate are stably installed, the assembly stabilizing effect of the lower arc plate and the upper arc plate on the two small-caliber pipelines is enhanced, by arranging the limiting