Hexagonal CaTiO 3 :Eu 3+ nanosheets were prepared by a supercritical fluid method. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and luminescence spectrometer (LS). Under 466nm light excitation, the CaTiO 3 :Eu 3+ nanosheets showed a strong red (616nm) emission corresponding to 5D 0 →7F 2 transition of Eu 3+ . The effect of Eu 3+ concentration was investigated, among these samples, 0.2mol% Eu 3+ doped CaTiO 3 nanosheets showed the strongest luminescent intensity. Compared with nanoparticles, the nanosheets showed better luminescence property. Growth mechanism of hexagonal CaTiO 3 nanosheets was also discussed.