Abstract: To improve the test efficiency and reduce the test cost and risk for the motor system, the power-level real-time simulation method of brushless DC motor (BLDCM) in regenerative braking process was presented in this paper. The winding of the real BLDCM was simulated by the power-level current source of the virtual BLDCM. Then, the electric power can be interacted between the virtual BLDCM and motor driver. The bilinear transformation and inverse Z-transform method were used to derive the numerical model based on line voltage. The current path and the relationship between the voltage and current of the virtual BLDCM with regenerative braking were analyzed. The acquiring method of the virtual winding voltage in the regenerative braking process was presented to calculate the BLDCM numerical model. Based on the power-level virtual BLDCM experimental platform, the real-time simulation with regenerative braking was performed. Furthermore, the offline simulation of BLDCM with regenerative braking was performed by using MATLAB software to verify the experimental results. Results show that both transient and steady state of the BLDCM can be simulated accurately without changing any hardware of the motor driver, and the real-time simulation of power-level virtual BLDCM in the regenerative braking process can be realized effectively.