The photo sensitized degradation of polymer system is occasionally used as a means of solving the problem of environmental pollution, photostabilization of polystyrene films using chrom complexes was investigated. Poly styrene films with a thickness of 80μm and contains complexes concentration of 0.05% wt were produced by the casting method with chloroform being the solvent The photostabilization activities of these complexes were determined by monitoring changes in carbonyl,(I CO) and hydroxyl,(I OH) indices and calculating the photodecomposition rate constant (k d), the average molecular weight for the studied films The results obtained showed that the photostabilization activity of polystyrene film in the presence of the complexes as additive follows the trends: