The agricultural film was prepared by co-extrusion of metallocene polyethylene resin, dripping agent, anti-photooxidation and anti-aging additives using three-layer co-extrusion and internal cooling process. With the use of metallocene, the puncture resistance and tensile strength of the film are obviously improved, while the service life of the film is emphasized, the dripping effect of the film is taken into account. After the film is covered by crops, the water film formed by the temperature difference between inside and outside of the film goes down along the film surface, which avoids the phenomenon of rotten leaves, rotten flowers and rotten fruits caused by the dripping of the water droplets, and also reduces the occurrence of diseases and insect pests.