YBCO+PVDF films had been successfully fabricated by chemical solution deposition method. The decomposition behavior of YBCO gel was influenced by the addition of PVDF. YBCO+PVDF gel was suitable for fast pyrolysis process. During the pyrolysis process, the fluorine could enter into the intermediate phase and inhibit the formation of BaCO₃. The results showed that the addition of PVDF would improve the epitaxial growth of YBCO film. It was beneficial to achieve high performance of YBCO film.