Abstract: In recent years, there is increasing interest in photorefractive polymer due to its good optical processing capability. Compared to photorefractive crystal, it has the advantages of large nonlinear optical coefficient, quick response, low cost and great compositional flexibility, thus there is a potential for photorefractive polymer to become the materials for preparing photonic integrated device in the future. The applications of photorefractive polymer in pattern recognition, holographic storage and optical coherence tomography(OCT) are summarized. At last, it is pointed out that there is band gap in photorefractive polymer.