Self adhesive waterproof and vapor barrier film is a high-performance flexible composite material that uses a sandwich structure to endow the product with multiple excellent comprehensive properties such as high strength, flexibility, waterproof and vapor barrier. This product provides soft protective sealing for the indoor side of door and window openings, waterproof and blocking moisture transmission, achieving complete indoor airtightness. Waterproof and vapor barrier membranes are laid on top of the foundation layer, which can enhance the water tightness of the building while preventing indoor moisture from penetrating into the insulation layer, protecting the insulation layer from erosion, achieving excellent water vapor insulation effect on the wall or roof, and allowing the water vapor inside the enclosure to be smoothly discharged through the waterproof and breathable membrane, protecting the thermal performance of the enclosure structure, thereby achieving the goal of energy conservation.