Through the special electronic control and servo system, the speed closed-loop, head pressure closed-loop and wall thickness closed-loop of the whole system can be realized, so as to ensure the high accuracy and high response of the whole system. The centralized temperature control method is adopted to ensure the high accuracy of temperature control. This scheme has been used in sheet mills, pipe mills, special-shaped mills, granulators and other extruders. Adopt man-machine interface, touch screen, frequency conversion technology, intelligent, high integration, automatic integration.?