The electromagnetic coupling braking energy recovery system (EC-BERS) was proposed with the advantages of zero friction, none impact of electromagnetic coupler and higher power and efficiency of flywheel. It is potentially cost-effective between a wheel and a small flywheel. The proposed EC-BERS, which requires only a motor and a converter, can capture more of the mechanical energy, and the rest needs to be processed by the converter. In this paper, the electromagnetic coupler model was established based on Simulink software. Then a coupler test platform was built to verify the effectiveness of the model. Finally, energy conversion process of EC-BERS under deceleration and cruise state was simulated. The results show that most of the energy between wheels and flywheels is transferred as mechanical energy, and the battery had a low participation in this state.