The invention discloses a display screen protective film for computers and a preparation method thereof. The display screen protective film for computers comprises a base and an enhancer, the base comprises, by weight: 25-35 parts of epoxy resin, 15-20 parts of organosilicon-modified polycarbonate and 15-20 parts of hydroxymethyl acrylamide, and the enhancer comprises, by weight: 5-10 parts of polyvinyl alcohol, 5-8 parts of polyethylene glycol, 4-8 parts of pentaerythritol ester, 2-8 parts of acetone, 4-8 parts of sodium carbonate powder, 10-20 parts of silica gel and 2-6 parts of a titanate. By optimizing the display screen protective film for computers, high reflectivity and fog resistance of the display screen protective film for computers are improved significantly. The display screen protective film for computers prepared by using the method of the invention is 1.53-1.68 in refraction coefficient, 15 DEG C in temperature difference, and capable of resisting fog for longer than 2 h under relative humidity of 90%.