The agricultural film was prepared by co-extrusion of polyethylene resin, dripping agent, photo-oxygen resistance, aging resistance and other composite additives using three-layer co-extrusion and internal cooling process. The product lays stress on the service life of the film and the dripping effect of the product. When the crop is covered with the film, the water film formed by the temperature difference between the inside and outside of the film goes down along the film surface, avoiding the phenomena of rotten leaves, rotten flowers and rotten fruits caused by the dripping of water droplets, and also reducing the occurrence of diseases and insect pests. The product is mainly used for the seedling raising of vegetables, fruits, flowers and other cash crops and the covering of spring and autumn greenhouses.