To improve the performance of FSAE (Formula SAE) electric racing car in the endurance race, a whole regenerative braking system was designed accordingly. Firstly, the simulation software ADVISOR was redeveloped and the vehicle model, wheel model, driving control model and battery model were modified. Secondly, to ensure the system stability and reduce the influences of controller and sensor accuracy, a rear-wheel parallel control strategy of regenerative braking system was proposed and the simulation of this control strategy was complimented in ADVISOR. Thirdly, the regenerative braking system controller was designed and racing car trials were carried out. The results showed that in the simulations and trials, the regenerating efficiencies were 20.89% and 19.07% respectively. The regenerative braking system with the rear-wheel parallel control strategy could improve the performance of FSAE racing car effectively.