The invention discloses a novel electric vehicle driving system. The system comprises a voltage closed-loop PID regulator, a Z-source inverter and a three-phase motor which are connected in sequence, wherein the voltage closed-loop PID regulator is used for increasing the input voltage of the Z-source inverter and controlling the output voltage of the inverter by adding a direct-connection zero vector when the supply voltage of a direct-current voltage source is too low, and the Z-source inverter is used for converting direct current into alternating current required by the three-phase motor. According to the system, a voltage closed loop is additionally arranged in the electric vehicle driving system while a Z-source network is introduced to increase the input voltage of the inverter and control the output voltage of the inverter by adding the direct-connection zero vector when the supply voltage of a storage battery is too low, so that the output performance of a motor driving system is improved. According to the system, the acceleration performance and power performance of an electric vehicle can be effectively improved, the efficiency of the driving system can be improved, and cost is quite low.