Special single screw extruder for the use of polyolefine material, high speed extrusion and effective plasticization. The special detachment type mixing screw and the standard designed die with spiral structure & reasonable channel are applicable to produce pipes with smooth inner and outer wall. Unique sizing and cooling mode is capable of producing pipe scope Φ50-Φ200mm,production speed is up to 0.6-1.5m/min. All kind of polyolefine material,multi-layers spiral strengthening pipe can be co-extruded for various uses,80% of recycle material can be used in production; Optimum spiral bronze sizing sleeve,pre-cooling and powerful vacuum suction device in the entrance, suiting for high speed extrusion of pipes; Specific design for spray cooling trough; Cooling water trough is made of stainless steel; High efficient cooling comes from peculiar spraying nozzle and high efficiency water pump; Three-dimensional regulation, longitudinal move by motot; Advanced co-extrusion technology, lower the cost for using recycling material.