The electrical properties and its stability of Zn-Pr-Co-Cr-Tb-based varistors were investigated for different sintering temperatures. As the sintering temperatures increased, the varistor voltage decreased in the range of $705.2{sim}299.1$ V/mm, the nonlinear coefficient decreased in the range of $42.4{sim}31.7$, and the leakage current was in the range of $1.0{sim}1.7;{mu}A$. The stability of electrical characteristics increased with the increase of sintering temperature. The varistors sintered at $1350^{circ}C$ marked the high electrical stability, with $%Delta$ $V_{1mA}=+0.1%,;%Delta{alpha}=+3.2%$, and $%{Delta}I_L=+117.6%$ for DC accelerated aging stress state of $0.95V_{1mA}/150^{circ}C/24;h$.