Abstract: Thedielectric,piezoelectricand elastic propertiesof（Bi_0.5Na_0.5）_1-x Ba_x TiO₃ （x =0,0.02,0.04,0.06）ceramics prepared by sol-gelmethod were investigated.It is found that（Bi_0.5Na_0.5）_0.94-Ba_0.06 TiO₃ ceramic shows superior piezoelectric propertiesin th is system.The （Bi_0.5Na_0.5）_0.94 Ba_0.06 TiO₃ ceramic prepared by sol-gelmethod showshigher piezoelectric constant （d₃₃ =173×10^-12 C/N）,higher electromechanical coupling coefficient （k_t =56%,k_p =26%）,larger Poisson ratio（б=0.3）,larger dielectric constant （ε^T_r33 =820）and larger dielectric loss（tgδ=3.9%）,but lower frequency constants（N_t =2250Hz ·m,N_p =2810Hz ·m）and lower depolarization temperatu res（T_d =75℃）than the values of the ceramicsprepared by conventional technique.