Positioning machining device for irregular cylindrical workpiece

The utility model discloses a positioning and processing device for irregular cylindrical workpieces, which belongs to the field of tools and comprises a fixed large-end base and a fixed small-end base, the large-end base is detachably connected with large-end positioning blocks which are vertically symmetrical, a large-end multi-width disc is arranged on one side of each large-end positioning block, and a small-end multi-width disc is arranged on the other side of each large-end positioning block. The small-end base is detachably connected with small-end positioning blocks which are symmetrical up and down, and a small-end multi-width disc is arranged on one side of each small-end positioning block; a plurality of axial pulling plates are arranged on the circumferences of the large-end multi-width disc and the small-end multi-width disc, radial threaded holes are formed in the ends of the axial pulling plates, and clamping screws are connected into the radial threaded holes in a threaded mode; a large positi