Abstract: In recent years, with the development of distributed energy, large-scale new energy vehicles had been promoted nationwide, which effectively reduced carbon emissions and promoted energy conservation and emission reduction. Brushless DC motor of electric vehicle with traditional PID control strategy had some disadvantages such as slow response speed and weak disturbance resistance.In order to solve these problems, this thesis designed a new type of control system with double closed-loop brushless DC motor.The system was analyzed from the aspects of system model and control strategy.The current loop and the speed loop of the designed system used PID control and fuzzy PI control method respectively. Under this system, the speed simulation experiments based on no-load and load were carried out for PID control and fuzzy PI control respectively.The simulation results showed that the fuzzy PI control system had better stability than the PID control system.