The effects of the sintering temperature and doping amount of TiO2 on the electrical performance of TiO2 based caristor ceramics have been investigated in this paper.The results show that the prepared TiO2 based varisor ceramics have good comprehensive electrical performance at sintering temperature of 1 400 ℃ and 1.0％ mol of CeO2 doping, its varistor voltage is 7.7 V/mm,nonlinear coefficient is 3.8,the leakage current is 0.1 A,and also has excellent dielectric constant and dielectric loss.