Kwon et al.8 proposed a multi-objective optimization method for the transmission ratio and driving parameters of a dual-motor two-speed power transmission system and established a dual-motor two-speed transmission model. The transmission ratio and motor drive were optimized by a multi-objective optimization method. The allocation of parameters was optimized to improve the driving efficiency of the motor and effectively weigh the efficiency and performance of the motor. Huang et al.9 proposed an intuitive transmission ratio optimization design method, with the transmission ratio as a parameter and energy utilization as the optimization goal. By analyzing the basis of the gear setting, the method was able to achieve the power performance required for urban road conditions. The transmission ratio was optimized under this condition. The simulation results showed that the optimized transmission ratio could effectively improve the energy utilization rate of the vehicle to meet the road driving requirements. Zhou et al.10 used a particle swarm optimization algorithm based on simulated annealing to optimize the transmission ratio of a pure electric vehicle. By introducing weight coefficients, the specific energy consumption and power factor of the driving conditions were used as the optimization objective function, and the power of the vehicle was selected as the constraint condition to optimize the transmission ratio of the drive train. The results showed that the specific energy consumption of the vehicle was reduced after optimization, and the power factor of the vehicle was significantly improved. The above studies accounted for the dynamics of the car while optimizing the car economy. However, they focused on the optimization of the transmission ratio and did not take into account the influence of the shifting schedule.