introduction: this three layer corrugated paperboard production line consist of 16 machines. it can produce paperboards automatically in large quantity with high efficiency and good quality. the quality conforms to the national standard. the machines are easy to operate with centralized control system, which reduce the labor intensity greatly. the high temperature conducting oil can provide heat source for the whole machine, which reduces consumption greatly and cuts down the cost effectively. compared with steam heating, it saves energy over 60%. this line is usually used in the large and middle scale boxboard plants.