This article mainly around the light truck cab coating coating process in the process of planning and design of the production line technique route selection,water-based B1 B2 and water-based Monocoat flexible collinear,a variety of light truck models of flexible collinear conveying technology,a variety of light truck vehicles flexible automatic coating technology,super flexible light trucks automatic spray technology,internal and external surface coating process and equipment technology from several aspects such as energy saving and emission reduction from the angle of environmental protection flexible design were discussed.