The PE extrusion line is controlled by computer. The screw uses comprehensive mixed part with belt barrier and mixed melting head . New pattern notch barrel makes good performance extruding. The extruding line is also equipped with special extruder with marking line, PE big caliber and thick wall pipe die head adopts latest spire or basket-like type technique that makes sure a stable and credible extruding. It adopts water film lubricating and hydroseal cooling system to suit for the material requirement of PE. Make sure the stabilization of diameter and round degree when producing thick wall pipe at high speed. The special designed multilevel vacuum and cooling device and especial high pressure cooling system ensure the extrusion of big caliber and high pressure degree PE pipe stuff. The hauler can be divided into three, four and six pedrail hauler according to the pipe specification. It adopts superfine speed regulating system that ensures an stable and credible operating. The cutter adopts planet cutter which has a higher automatization of computer control and longer period of maintenance.