This system provides an optimal solution for extrusion. It consists of several heaters connected with temperature reducing systems. Depending on specific application requirements, the number and layout of this item can be combined into one system. As the extrusion cylinder is completely covered, it has a uniform temperature flow. Also due to the enlarged surface of heating radiation, the efficiency is improved. This product is one of the most advanced heating and cooling devices for cylinder of single-screw extrusion machines in China and abroad.