The (Ba0.99Bi0.01)(Cu0.005Ti0.995)O3 fine powders were prepared by Sol Gel self ignition method and the ceramics were sintered.The phase and microstructure of the sample have been analyzed by XRD and SEM.The results demonstrate that (Ba0.99Bi0.01)(Cu0.005Ti0.995)O3 ceramics are tetragonal perovskite structure and the grain size is uniform.The Curie temperature variation, dielectric and piezoelectric properties,and the temperature stability of (Ba0.99Bi0.01)(Cu0.005Ti0.995)O3 ceramics have been investigated under different sintering temperature.The experimental results show that Bi and Cu co doping can reduce the sintering temperature of BaTiO3 ceramic,improve the electrical performance and promote the TC from 120 ℃ to 155 ℃.The samples sintered at 1 240 ℃ exhibits optimum piezoelectric properties with the piezoelectric constant (d33) of 80 pC/N,electromechanical coupling factor (kp) of 12.6%,quality factor (Qm) of 310 and the piezoelectric constant (d31) of -16.8 pC/N,and the piezoelectric temperature stability has been greatly improved.