The work aims to study the ultraviolet transmittance and transparency of the PVA (polyvinyl alcohol) composite film (with UV shielding agents). Composite films were prepared by adding anti-ultraviolet agents with different types and mass fraction into PVA. Then UV transmittance, transparency and haze were tested. Adding organic anti-ultraviolet agent UV-284 could effectively block ultraviolet rays, but the composite film was yellow, which affected the appearance of the product. Adding inorganic UV shielding agent caused particle aggregation in the film. When the amount of inorganic UV shielding agent (Nano-TiO2) was 2.5%, the composite film's UV transmittance reached about 2%. If more was added, there would be no obvious change. In conclusion, the ultraviolet transmittance of the film is decreased obviously, while the transmittance is decreased and the haze is increased after the addition of UV shielding agent. The UV shielding effect of the composite films with Nano-TiO2 is better than the composite films with the same amount of UV-284 or Nano-ZnO.