Machine head structure of cable plastic extruding machine

The utility model discloses a cable plastic extruding machine head structure which comprises a machine head shell, a mold core seat, a mold core and an outer mold, the machine head shell is provided with a cavity, the mold core seat is installed in the cavity, the mold core is fixedly connected with the mold core seat, the outer mold is fixedly connected with the machine head shell, and the outer mold is provided with an outer mold outlet. The machine head shell is provided with an insulating material injection port, the mold core seat is provided with a shunting part and a drainage part, and the shunting part and the drainage part define an insulating material runner communicated with the insulating material injection port. During use, an insulating material enters the insulating material runner from the insulating material injection port under the action of pressure, flows into a gap between the mold core and the outer mold after passing through the insulating material runner, and then is extruded on a cond