Abstract- In this work, poly vinylidene fluoride/nanodiamond nanocomposite films with different concentration of nanodiamond particles were prepared by solution casting method. The FTIR results and XRD patterns provided the changes of intensity and content of chemical connection and microcrystalline planes into poly vinylidene fluoride nanocomposite films with different concentrations of nanodiamond particles. The optical property was investigated by using fluorescence and UV-vis spectroscopy. The absorption spectra of samples were obtained and showing high absorption in UV region (190-290 nm). At the end, the surface images demonstrated the spherulitic structure characteristic of samples and the size of the spherulites in pure PVDF obviously decreased after adding of nanodiamond particles content.