BaTiO3/ PVDF nanocomposites were prepared via in-situ growth of nanosized BaTiO3 particlesin PVDF matrix by using the solgel method. The present elements of BaTiO3/ PVDF nanocomposites were ana-lyzed by an electron probe X-ray microanalyser. Nanosized BaTiO3 grown in the composite films was characterizedby an X-ray diffractometer and a transmission electron microscope, and the dielectric properties of the compositefilms were measured. The distribution of BaTiO3 nanoparticles in-situ grown in the PVDF matrix was examined us-ing a scanning electron microscope.