A paper machine is a collective term for a complete set of equipment that forms a paper web for pulp, including a main unit such as a pulp box, a mesh unit, a pressing unit, a drying unit, a calendering machine, a paper rolling machine, and a transmission unit, as well as auxiliary systems such as steam, water, vacuum, lubrication, and heat recovery.

　　A machine that produces paper by dewatering the pulp water suspension that meets the requirements of papermaking through a filter, mechanical extrusion dewatering, and drying processes. The paper machine consists of three main parts: forming, pressing, and drying, which complete the above process. It is equipped with necessary finishing, coiling, and transmission devices, as well as auxiliary systems such as pulp supply, pulp and white water circulation, vacuum, ventilation and exhaust, paper loss treatment and lubrication, and self-control. The specifications of paper machines are often expressed by the width of the finished paper they produce (referred to as the width of the paper), the width of the copper mesh, and the preferred operating speed. The width of modern large paper machines can reach 11m, the working speed of the machine can reach over 1000m/min, the daily paper production can reach hundreds of tons, and the weight of the entire machine can reach over a thousand tons, reaching over a hundred meters. Small paper machines are commonly used in developing countries and some specialty paper production, with a width of 1-3m and a working speed of tens of meters to 200 meters per minute.