A device for shaping a special-shaped tube through bending belongs to the technical field of machining, and comprises a bend part, a central shaft, a holding part, a booster part, a rotation handle and a platen, wherein the bend part and the booster part are respectively fixed on the platen, the central shaft passes through the bend part, and the holding part is fixedly connected with the bend part which is fixedly connected with the rotation handle. The device uses a mode of twisting to realize bending, and has the advantages of high efficiency and good shaping effect. The bend part is divided into three layers, and an adjusting sheet of 0.1mm can be added on the medium layer for bending cores to realize fine adjustment and to set a fine gap for good bending quality, thereby effectively controlling bend, crumple and distortion of cross-section.