Novel red light conversion film and preparation method and application thereof

The invention discloses a novel red light conversion film and a preparation method and an application thereof. The novel red light conversion film comprises a light conversion agent and a carrier; a red fluorescent powder is selected and used as the light conversion agent, and cellulose is selected and used as the carrier; the cellulose is a most abundant natural polymer on the earth and has the advantages of being safe, non-toxic and renewable, and a synthetic material of the cellulose not only has excellent mechanical properties but also is biodegradable. The novel red light conversion film is an important change to a conventional agricultural polymer material thin film; the natural polymer and the light conversion agent are combined, conventional renewable green resources are fully utilized, environmental problems brought by synthetic polymer is avoided, and optical properties are increased based on the traditional thin film. The light conversion film has high-efficiency stimulation at the wavelength of 200-600 nm, and can convert ultraviolet light and a part of visible light into red light useful for plant growth so as to improve the utilization rate of light energy; and the light conversion film can be used as agricultural greenhouse films and plastic films and is applied in crop cultivation, seedling growing and other aspects.