Steel structural part spraying system and method for spraying steel structural part through system

The invention belongs to the technical field of steel structural part spraying systems and spraying methods, and discloses a steel structural part spraying system and a method for spraying a steel structural part through the steel structural part spraying system. The main technical characteristics are as follows: the device comprises a spraying circulation track, a support trolley and a trolley traction mechanism, wherein the support trolley and the trolley traction mechanism are positioned on the spraying circulation track; and a feeding area, a primer spraying area, a primer drying area and a first discharging area are arranged on the spraying circulation track. The steel structural part is placed on the supporting trolley through hoisting; the supporting trolley drives the steel structural part to move forwards along the spraying track, and paint spraying drying and discharging are achieved. In the spraying process, the non-spraying area is small, subsequent processing is facilitated, air pollution caused