Pipeline pretreatment die filling device

The utility model discloses a pipeline pretreatment die-filling device which comprises a fixed die, a plurality of outer inclined wedge blocks, a plurality of inner inclined wedge blocks and a plurality of outer inclined wedge blocks, wherein the rear end of the fixed die is provided with an opening; the movable mold is located on the rear side of the fixed mold, the movable mold comprises a push plate and a plurality of inner inclined wedge blocks, the inner inclined wedge blocks are in sliding connection along different radiuses of the push plate, and the inner inclined wedge blocks are matched with the outer inclined wedge blocks to achieve radial movement of the inner inclined wedge blocks; the movable mechanism is used for adjusting the relative position between the movable mold and the fixed mold; the pipeline supporting piece is provided with a steel die capable of elastically expanding, one end of the steel die is provided with an inner tooth section, the other end of the steel die is provided with an