Just the right amount polyvinyl alcohol and some additives were introduced into the gelatin ammonium dichromate system.The results of experiments and inspections Showed that many-sided influences emerged in the holographic performance properties of dichromated gelatin when the polyvinyl alcohol was incorporated. The bias hardness of the film was raised. Its holograms' micrestructure was varied, surface relief was deepened and environmental Stability was improved, etc. On the other hand, the excellent holographic characteristics of the conventional dichromated gelatin were kept. Therefore, it can be advantageously used for holograms and holographic optical elements. Its principal principle is discussed and the results of the experiments and inspections are presented.