The solid wall pipe production line is mainly used for producing PVC plastic pipes with various diameters and thicknesses, such as building water supply and drainage, agricultural water supply and drainage, cable laying and so on. The production line is composed of a conical twin-screw extruder, a die, a vacuum setting box, a cooling spray box, a tractor, a cutting machine, a turning frame, etc. Extruder and tractor adopt imported frequency conversion speed regulating device, vacuum pump and traction motor adopt high quality imported products. The tractor has two claw, three jaw, four jaw, six paw and other traction mode. With saw blade cutting or planetary cutting, belt gauge and thickening device are also included. The whole production line is reliable, and the production efficiency is high.