This production line fits for producing 3D drainage network, also called 3D earthwork drainage board, channel drainage board, drainage board with high drainage ability, can bear high pressure, high chemical and aging resistance, can replace traditional sand and stone layers, fit for drainage of garbage burying, roadbed and inside wall of channel, composed of plastic network dual surface bonding earthwork cloth with vertical structure. Reasonable design, novel structure, high automatization and easy operation Screw adopts special mixing function and high plastic design grade to assure good melting, even color and high extrusion. Adopt frequency speed control, far infrared ray energy-saving heater, automatic digital temperature controller which has high efficiency and low consumption.