Photosensitive polymers of 4, 4-diazidodiphenyl+PVA, diazidoterephthalate + PVA, and PVA-p-azidobenzoate were prepared and their photosensitive characters were studied. The results showed that the gel fraction was 0.85 for PVA-p-azidobenzoate and 0.45 for 4, 4-diazidodiphenyl+PVA and diazidoterephalate +PVA respectively. Sensitizers of acetophenone, benzophenone and 5-nitroacenaphthene were added, and following effects were observed for each type of photosensitive resins. In the case of 4, 4-diazidodiphenyl+PVA, all sensitizers increased gel fraction to the same value of 0.55. However, in the case of diazidoterphthalate + PVA, gel fraction was increased to 0.70 by benzophenone and 0.55 by acetophenone. When benzophenone, acetophenone and 5-nitroacenaphthene were added to PVA-p azidobenzoate, the gel fractions were increased to be 0.95, 0.90 and 0.90, respectively.