This production line is in the form of a climbing track coating line, which can be flexibly arranged in the workshop according to production needs, and a complex transmission line is formed by a chain track. The conveyed items are suspended in the air, which can save production area and reduce energy consumption. It can also perform a variety of process operations while being conveyed. Due to continuous operation, objects are delivered one after another, and after different process operations are completed, they are transported away one after another, which can realize rhythmic flow production. Large production capacity and rhythmic operation.