The invention discloses a weather-proof durable plastic door window which is prepared from the following raw materials in parts by weight: 1-3 parts of gluconolactone, 2-3 parts of diphenyl imidazoline, 4-6 parts of monopotassium phosphate, 2-4 parts of butyltin tris(2-ethylhexanoate), 30-40 parts of graphite powder, 27-30 parts of wollastonite powder, 7-10 parts of poly (butyl acrylate), 1-2 parts of amophophallus gum, 320-370 parts of polyvinyl chloride, 60-70 parts of a 20-30% sodium hydroxide solution, 36-40 parts of benzyl chloride, 40-42 parts of divinylbenzene, 70-80 parts of styrene, 0.3-0.6 part of benzoyl peroxide and 1-2 parts of Span-80. According to the weather-proof durable plastic door window, since sisal fibers are subjected to refrigeration and swelling treatment, the dispersity of cellulose is improved, the accessibility of benzyl chloride to cellulose is increased, the quantity of hydroxyl is reduced after etherification, the cellulose crystal texture is damaged, the thermoplasticity is obtained, and meanwhile, the dimensional stability, weather resistance, corrosion resistance and the like of fibers are correspondingly improved since the quantity of hydroxyl is reduced.