The utility model provides a planet screw extruder of processing PVC material, including control section, driving part, feeding part, host computer subtotal nose section, main motor passes through belt drive and retarder connection, the reduction gear passes through the shaft coupling and is connected with the main shaft, hopper top is connected through the locating pin with partial down, whereinarch breaking device lies in part under the hopper, the material is got into by the feeding part barrel and carries the section, carry the partial screw rod of section to transport the melt zone thatsingle screw section divides gradually with the material, carry the section and the pitch of melt zone to diminish gradually, be equipped with electric heater unit on the melt zone internal chamber, the material becomes among the laggard income planet section of molten condition, the driving screw rotation, six roots of sensation planet screw rod is also in the revolution simultaneously, the material carries out the plastify, it is mixing. The material is last to be got into and forms the required product shape among the aircraft nose bush. The utility model discloses simple structure, efficient, the hot exchange area of plastify is big, self -cleaning effect good, in the runner nos dead point, do not have a material because of being detained advantage such as decomposition, and the energyconsumption is hanged down, output is high.