The crystal structure and surface morphology of the CaTiO3:Sm3+ nanomaterials prepared by combustion synthesis were determined by XRD RigakuUltima IV diffractometer using Cu Kα radiation (1.54184 Å) depicting orthorhombic phase of CaTiO3:Sm3+ with space group Pbnm& scanning electron microscopy (SEM) respectively. The phosphor particles size was found about 10-15nm. Upon excitation using 407nm light, the PL emission spectra obtained due to 4f transition of Sm3+ from 4G5/2 → 6HJ(J=5/2, 7/2 ,9/2 ,11/2) consists of five peaks located at 564nm, 601-611nm, 647nm and 711 nm respectively. Among these Peaks, the peak located at 564 nm (4G5/2→6H5/2) was purely due to magnetic-dipole transition (MD), and at 648 nm (4G5/2→6H9/2) was purely due to electric dipole transition (ED). But the main peak located at 601 nm (4G5/2→6H7/2) was due to a partly magnetic and partly a force dielectric-dipole transition showing bright orange-red emission thus prove CaTiO3:Sm3+ phosphor a strong promising orange-red phosphor for display application.