Ca_xBa_(1-x)TiO_3(CBT)fine particles doped with red luminescence center of Pr~(3+)ions (Pr:CBT)were successfully synthesized by salt assisted spray pyrolysis(SASP)process.Scanning electronic microscope(SEM)and laser scattering analysis demonstrate that salt can be removed from the surface of particles by washing with Milli-Q water and the particles can be further separated by ball-milling to get well-dispersed Pr~(3+)ions doped CBT fine particles.The luminescence properties,such as photoluminescence(PL)and mechanoluminescence(ML),of as-synthesized Pr:CBT particles were investigated.For Pr:CBT fine particles with different Ca molar ratios,all the samples show one emission at 612 nm,with increasing Ca molar ratio,PL intensity of Pr:CBT fine particles become stronger and stronger.When pressure was loaded on the Pr:CBT pellet,mechanoluminescence(ML)emission was measured.The results show that the ML intensity is proportional to the applied pressure.