The invention discloses an adjustable wire wrapping device for processing of bismuth cored wires. The device comprises a base and the cored wires. A perpendicular vertical plate is welded to the portion close to the edge of the rear side of the upper surface of the base. A controller is fixed to the portion close to the middle of the outer wall of the side, away from the base, of the perpendicularvertical plate through a bolt, a round rod is welded to the portion close to the top end of the side, away from the perpendicular vertical plate, of the perpendicular vertical plate, the round rod issleeved with a wire rolling wheel, the outer wall of the round rod is sleeved with a compression spring, a box iron sliding rail is welded to the edge of the side, away from the perpendicular vertical plate, of the upper surface of the base, a sliding block is in sliding connection with the interior of the box iron sliding rail, a rocking rod is rotationally connected to the upper surface of thesliding block, and the middle of the rocking rod is provided with a strip-shaped hole. The cored wires can be evenly laid on the outer wall of a roller body of the wire rolling wheel, the roll collapsing phenomenon is avoided, the rocking rod can do stable cyclic rotation around the sliding block, and therefore power output of the device is more stable.