Cylinder barrel is an important part of the cylinder. It is usually made of aluminum alloy, stainless steel and other materials. It provides a stable channel and support for the movement of the piston. The inside of the cylinder barrel is required to be smooth and flat to reduce the frictional resistance during the movement of the piston and to ensure the efficient operation of the cylinder. The size and precision of the cylinder barrel directly affects the performance of the cylinder. Its diameter determines the size of the output force of the cylinder, and its length affects the stroke range of the piston. Strict control of dimensional accuracy can ensure good sealing and movement accuracy. In terms of application, the cylinder barrel is widely used in automated production lines, machinery manufacturing, automobile manufacturing and other fields to realize various linear motion drive and control tasks. It has the advantages of simple structure, high reliability and fast response speed, which provides strong support for the automation and high efficiency of industrial production.