In the past, prefabricated concrete slab or asbestos slab was used for the roof of industrial plant. With the rapid promotion of light steel structure, PVC roof tile has replaced the above two materials with many significant advantages. At the same time of providing better heat insulation effect, PVC roof tile with the mature development of light steel structure can reflect a series of advantages of light steel system, such as light weight, fast, flexible layout and so on, so it has become a scheme in the current single-layer factory buildings.