Abstract: The effects of Pb（TiSn）O₃ doping and sintering temperature on the microstructure and dielectric properties of BaTiO₃ ceramics was investigated.It was observed that the BaTiO₃ ceramics doped with Pb（TiSn）O₃ can form core-shell-structured fine grains and dielectric constant increases.The Curie temperature of the ceramics moves higher to 150 ℃,and the temperature coefficiency characteristics is improved.The XRD analysis shows that when the ceramics are sintered at higher temperature,the decrease of the tetragonality results from the improvement of the temperature coefficiency characteristics.The X8R dielectric materials can be sintered at 1180 ℃ for 6h by doping 0.9mol%Pb（TiSn）O₃ additives into the BaTiO₃ ceramics,and its excellent dielectric properties are achieved,i.e.ε 25℃＞1500,tanδ＜1.8% and ΔC/C_25℃（-55 ℃ ～180 ℃）≤ 15%.