The functions of any form of headbox paper machine are specifically undertaken and coordinated by the three parts of the pulp distributor, the rectifier and the paper feeder.

A good headbox paper machine must have the following performance:(1) A paper web with a uniform and stable basis weight can be copied, and there is no longitudinal stream on the paper web;

The headbox paper machine​ is known as the "heart" of the paper machine, the key component of the paper machine, the hub connecting the two parts of the "flow" and the "forming", and it is also one of the fast-growing parts of the paper machine.

The headbox is a key part of the paper machine. The function of the headbox is to change the paper material pumped by the square pump from the pipe flow into a uniform, rectangular slurry flow with the same width as the paper machine, and the longitudinal flow velocity is uniform.