PVDF anticorrosion film (polyvinylidene fluoride anticorrosion film) is suitable as a roof anticorrosion layer because it has good weather resistance, UV resistance and high temperature resistance, and can maintain a stable protective effect under various extreme climate conditions. In addition, the high mechanical strength and excellent adhesion of PVDF film ensure that it will not easily fall off or be damaged during long-term use, thereby providing long-lasting protection and beautiful appearance, which is particularly suitable for roof applications exposed to outdoor environments for a long time.