The aim of the present study was to prepare a calcium fluoride (CaF2NP) Nano particle which is used in dental composites as dental filling compo glass type. CaF2 Nano powders were prepared using a Co-precipitation method using binary liquid. Crystal Structural characteristics and Elemental composition of (CaF2NP) Nanoparticles were predicted by X-ray diffraction (XRD), which showed crystalline peaks of this material. Elemental composition was obtained from EDX analysis. Morphology and diameters of the Nano fibers were studied by scanning electron Microscope (SEM). The size of the particles was also measured from SEM images about 58 ± 21 nm.