Abstract: The performance of electric vehicles is mainly affected by the charge and discharge characteristics and power characteristics of the power batteries, while the charging and discharging efficiency of lithium-ion power batteries decreases and the power characteristics deteriorate under low temperature conditions, which restricts the promotion and development of electric vehicles. In order to study the impact of low temperature conditions on the performance of electric vehicles, this paper conducts the effect of low temperature on the performance of lithium-ion power battery was studied through discharge experiments at different temperatures, and the influence of low temperature on the performance of electric vehicles was simulated and analyzed based on the experimental data selected by CRUISE software. The simulation results show that as the temperature decreases, the performance of electric vehicles will decrease significantly.