An electric vehicle model is established based on the design parameters to match and optimize the drive system of the electric vehicle. Then the influence laws of the battery capacity for the vehicle performance are researched deeply, and a novel strategy for batteries optimization and match is proposed based on SOC-weight coefficient defined. To obtain the optimal transmission ratio and develop the vehicle dynamic performance, a new vehicle performance integration coefficient is proposed to select the most effective drive ratio for the vehicle based on the vehicle driving cycle. Finally, the motor and vehicle performance is analyzed and the simulation results show that the matched and optimized vehicle parameters greatly meet drive targets in the ECE drive cycle, and it is much significant for the electric vehicle to improve the vehicle power performance, battery efficiency and driving range.